WHOIS Accuracy Benchmark: IP to Company APIs (2025)

Earlier blog posts such as ipinfo.io has worse data accuracy than ipapi.is and IP to Company Accuracy showed how ipapi.is in general outperforms the competition.

In this blog post, the 2025 WHOIS accuracy benchmark zooms out: 109 (somewhat randomly) selected IP addresses were audited on October 12, 2025 to measure how well the industry leading IP APIs keep WHOIS data up to date and accurate. The following IP API services were audited:

ipapi.is - Our platform with more than eight million WHOIS records that are constantly kept up to date.
ip-api.com - An oldish looking IP API with surprisingly accurate and up to date organization / WHOIS data.
ipinfo.io - The industry leader with a reputation for never getting company data wrong that surprisingly often makes critical mistakes.
ipdata.co - Also an established player in the IP API space.
ipbase.com - A newish IP API that lacks a lot in company and WHOIS data accuracy.
db-ip.com - A older European (French) IP API that has very good data accuracy when it comes to company and WHOIS data.

WHOIS Data Accuracy Drives Every Other IP API Data Field

The goal of this analysis is straightforward: Check how good of a job different IP API providers make in keeping basic WHOIS data up to date. In most cases, those IP API services do not offer WHOIS data directly in their API, but it's an open secret that the organization or company name a certain IP address (or a range of IP addresses) is associated with, is directly derived from WHOIS data that originates from RIPE NCC, ARIN, APNIC, LACNIC and AFRINIC WHOIS servers. This also applies to ASN data, but that's a topic for another blog post.

The organization or company name field influences hosting detection, partially VPN & Proxy Detection, abuse scoring, geolocation fallbacks and IP traffic classification. When IP to Company data is stale or inaccurate, every dependent pipeline inherits the error. WHOIS data is the base data of every IP API and inaccuracies in the base data will propagate to every other field and have tremendous impact on the quality of the data.

ipapi.is ingests more than eight million WHOIS records and keeps those records constantly up to date in order to provide accurate IP data.

WHOIS Sampling & Methodology

The comparison uses 109 unique IP addresses pulled from a manually crafted sample. Each IP address was looked up with a normal whois client on October 12, 2025 and the output was used as the ground truth. The sample is available in the following formats for you to audit every claim and compare the results:

Raw WHOIS exports such as 4-1946992000-1946992015.txt
Structured sample definition: ip-company-comparison-2025-sample.json
API responses and match analysis: ip-company-comparison-2025-aggregated.json

Each IP was looked up against the following services: ipapi.is, ipinfo.io, ip-api.com, db-ip.com, ipdata.co and ipbase.com. When ipinfo.io prefixes the organisation with an ASN banner (for example AS209 CenturyLink Communications) we ignore the AS segment and evaluate the remaining company string.

It is admitted that the sample was predominantly taken from more obscure and not straightforward WHOIS record formats such as the following:

ARIN Customer Delegation via CustName WHOIS records - Example: CustName: SAN JOSE POLICE
KRNIC and JPNIC WHOIS records with their NON-standard formats - Example: National University Corporation, Nagasaki University

But exactly this ability to handle also more fringe and niche cases of the WHOIS landscape is what makes the difference between a good and a great IP API, hence why we're doing this audit.

Accuracy Summary

The table below counts an API as correct when its reported company name matches the WHOIS assignee or customer name (case-insensitive, punctuation stripped). Partial strings such as ASN descriptions or ISP placeholders are treated as incorrect because they do not allow downstream classification.

Service	Matches / Total	Accuracy	Notable Failure Mode
ipapi.is	107 / 109	98.2%	Almost perfect accuracy in most cases, shows ability to handle most WHOIS record formats.
ip-api.com	89 / 109	81.7%	High accuracy in most cases, shows ability to handle most WHOIS record formats.
db-ip.com	87 / 109	79.8%	High accuracy in most cases, shows ability to handle most WHOIS record formats.
ipdata.co	58 / 109	53.2%	Average performance, not too bad.
ipinfo.io	10 / 109	9.2%	Very poor performance. ipinfo.io does not seem to be able to handle more fringe and niche cases of WHOIS record formats such as CustName WHOIS records or other non-standard formats.
ipbase.com	9 / 109	8.3%	Very poor performance. ipbase.com maintainers do not seem to know that there are more than the standard WHOIS record formats.

These numbers matter beyond vanity metrics: WHOIS accuracy is the root of every enrichment pipeline, from abuse triage to go-to-market analytics. When the root record is wrong, the derived flags (is_hosting, is_vpn and most importantly company) fields are wrong as well.

This sample intentionally spotlights networks that are associated with obscure and not straightforward WHOIS record formats, so the poor ipinfo.io score could be partially driven by that bias. Still, ipinfo.io markets itself as the industry leader that “never gets company data wrong”, so even a biased slice should not look this rough if the underlying dataset truly lived up to that promise.

What the Numbers Look Like on the Ground

A few sample highlights illustrate why the gap matters:

NYS DEPARTMENT OF ECONOMIC DEVELOPMENT (205.232.255.201): ipapi.is correctly identifies the organization as stated in WHOIS, while ipinfo.io incorrectly returns "Windstream Communications LLC"—the parent ISP rather than the actual assignee. ip-api.com matches the correct organization.
US EUROPEAN COMMAND (215.76.131.94): ipapi.is resolves the reassignment to the NATO command, while ip-api.com rewrites it to DoD Network Information Center. ipinfo.io fails with the generic "United States Department of Defense (DoD)" instead of the specific command unit.
University of Yamanashi (133.23.30.81): ipapi.is, ip-api.com and db-ip.com all correctly identify the university. However, ipinfo.io returns the completely wrong organization: "Research Organization of Information and Systems, National Institute of Informatics"—a different institution entirely.

Overall, ipinfo.io, ipdata.co and ipbase.com still demonstrate that they do not maintain a WHOIS-backed company dataset: the answers are often ISP placeholders. None of those responses are precise enough for anti-abuse, compliance reporting or accurate IP traffic classification.

Full Comparison Table

The table below lists every IP address in the sample, the ground truth WHOIS assignee, and the corresponding output from each API. The status line in each cell shows whether the value matched the WHOIS record (match), diverged (fail) or was missing entirely.

IP	RIR	WHOIS	Ground Truth	ipapi.is	ipinfo.io	ip-api.com	db-ip.com	ipdata.co	ipbase.com
8.243.18.27	ARIN	WHOIS	MINISTERIO DE RELAC.EXT.COM INT.Y CULTO	MINISTERIO DE RELAC.EXT.COM INT.Y CULTO Match	Level 3 Parent, LLC Mismatch	Ministerio De Relac.ext.com Int.y Culto Match	Ministerio De Relac.ext.com Int.y Culto Match	Ministerio de Relac.ext Int.y Culto Mismatch	Level 3 Parent, LLC Mismatch
12.50.19.158	ARIN	WHOIS	MOMENTUM TELECOM-MOMENTUM TELECO	MOMENTUM TELECOM-MOMENTUM TELECO Match	AT&T Enterprises, LLC Mismatch	Momentum Telecom Match	Momentum Telecom Match	Momentum Telecom Momentum Teleco Match	AT&T Enterprises, LLC Mismatch
12.105.80.23	ARIN	WHOIS	BAYLOR SCOTT AND WHITE	BAYLOR SCOTT AND WHITE Match	AT&T Enterprises, LLC Mismatch	Baylor Scott and White Match	Baylor Scott and White Match	AT&T Services Inc Mismatch	AT&T Enterprises, LLC Mismatch
35.130.62.61	ARIN	WHOIS	IHG CONNECT	IHG CONNECT Match	Charter Communications LLC Mismatch	IHG CONNECT Match	Ihg Connect Match	IHG Connect Match	Charter Communications LLC Mismatch
45.23.213.96	ARIN	WHOIS	TRIZEC PROPERTIES INC	TRIZEC PROPERTIES INC Match	AT&T Enterprises, LLC Mismatch	Trizec Properties Inc Match	Trizec Properties Inc Match	Trizec Properties Inc Match	AT&T Enterprises, LLC Mismatch
51.38.18.188	RIPE	WHOIS	Cebrian Diego	Cebrian Diego Match	OVH SAS Mismatch	Cebrian Diego Match	Cebrian Diego Match	OVH SAS Mismatch	OVH SAS Mismatch
58.214.254.64	APNIC	WHOIS	WUXI dingqiu juansi fangzhi corp	WUXI dingqiu juansi fangzhi corp Match	CHINANET-BACKBONE Mismatch	Wuxi Dingqiu Juansi Fangzhi Co., ltd Match	Wuxi Dingqiu Juansi Fangzhi Co., ltd Match	WUXI Dingqiu Juansi Fangzhi Co Ltd Match	CHINANET-BACKBONE Mismatch
62.90.222.198	RIPE	WHOIS	Barak I.T.C	Barak I.T.C Match	Cellcom Fixed Line Communication L.P Mismatch	013 Netvision Network Mismatch	— No Data	R.l.d.p Managment Mismatch	Cellcom Fixed Line Communication L.P Mismatch
62.111.185.153	RIPE	WHOIS	EUROINTER SP. Z O.O	EUROINTER SP. Z O.O Match	Netia SA Mismatch	NETIA Mismatch	— No Data	Gdanska 45A Mismatch	Netia SA Mismatch
63.193.54.196	ARIN	WHOIS	DonRood	DonRood Match	AT&T Enterprises, LLC Mismatch	DonRood Match	DonRood Match	Donrood Match	AT&T Enterprises, LLC Mismatch
63.199.248.81	ARIN	WHOIS	Bundy & Thompson Architects	Bundy & Thompson Architects Match	AT&T Enterprises, LLC Mismatch	Bundy & Thompson Architects Match	Bundy & Thompson Architects Match	Bundy & Thompson Architects Match	AT&T Enterprises, LLC Mismatch
63.202.29.148	ARIN	WHOIS	REBECCA CONNOLLY	REBECCA CONNOLLY Match	AT&T Enterprises, LLC Mismatch	Rebecca Connolly Match	Rebecca Connolly Match	AT&T Services Inc Mismatch	AT&T Enterprises, LLC Mismatch
63.203.247.156	ARIN	WHOIS	Robert Armitano	Robert Armitano Match	AT&T Enterprises, LLC Mismatch	Robert Armitano Match	Robert Armitano Match	AT&T Services Inc Mismatch	AT&T Enterprises, LLC Mismatch
64.64.7.104	ARIN	WHOIS	Moscom LLC	Moscom LLC Match	Leaseweb USA, Inc. Mismatch	Moscom LLC Match	Moscom LLC Match	Leaseweb Usa Inc Mismatch	Leaseweb USA, Inc. Mismatch
64.80.189.1	ARIN	WHOIS	FORTESSA INC. - 360 MCGHEE RD	FORTESSA INC. - 360 MCGHEE RD Match	Windstream Communications LLC Mismatch	Fortessa Inc. - 360 Mcghee RD Match	Fortessa Inc. - 360 Mcghee RD Match	Fortessa Inc 360 Mcghee Rd Match	Windstream Communications LLC Mismatch
64.146.143.236	ARIN	WHOIS	Public Utility District #1 of Kitsap County	Public Utility District #1 of Kitsap County Match	Northwest Open Access Network Mismatch	Public Utility District #1 of Kitsap County Match	Public Utility District #1 of Kitsap County Match	Kitsap County Match	Northwest Open Access Network Mismatch
64.146.253.38	ARIN	WHOIS	Public Utility District #1 of Kitsap County	Public Utility District #1 of Kitsap County Match	Northwest Open Access Network Mismatch	Public Utility District #1 of Kitsap County Match	Public Utility District #1 of Kitsap County Match	Kitsap County Match	Northwest Open Access Network Mismatch
64.165.145.56	ARIN	WHOIS	Federal Aviation Administration (FAA)	Federal Aviation Administration (FAA) Match	AT&T Enterprises, LLC Mismatch	Federal Aviation Administration Match	Federal Aviation Administration Match	AT&T Services Inc Mismatch	AT&T Enterprises, LLC Mismatch
64.174.255.128	ARIN	WHOIS	SAN JOSE POLICE	SAN JOSE POLICE Match	AT&T Enterprises, LLC Mismatch	SAN JOSE POLICE Match	San Jose Police Match	AT&T Services Inc Mismatch	AT&T Enterprises, LLC Mismatch
65.14.80.227	ARIN	WHOIS	Milberg Weiss Bershad and Schulm	Milberg Weiss Bershad and Schulm Match	AT&T Enterprises, LLC Mismatch	Milberg Weiss Bershad and Schulm Match	Milberg Weiss Bershad and Schulm Match	Milberg Weiss Bershad and Schulm Match	AT&T Enterprises, LLC Mismatch
65.66.135.1	ARIN	WHOIS	JAN LETOURNEAU	JAN LETOURNEAU Match	AT&T Enterprises, LLC Mismatch	JAN LETOURNEAU Match	Jan Letourneau Match	Jan Letourneau Match	AT&T Enterprises, LLC Mismatch
65.71.160.236	ARIN	WHOIS	Riley County	Riley County Match	AT&T Enterprises, LLC Mismatch	Riley County Match	Riley County Match	Riley County Match	AT&T Enterprises, LLC Mismatch
65.83.212.77	ARIN	WHOIS	ATL ADSL PPP	ATL ADSL PPP Match	AT&T Enterprises, LLC Mismatch	ATL ADSL PPP Match	Atl Adsl Ppp Match	AT&T Services Inc Mismatch	AT&T Enterprises, LLC Mismatch
65.202.54.164	ARIN	WHOIS	WS/GRANITE TELECOMMUNICATION/MICROSOFT	WS/GRANITE TELECOMMUNICATION/MICROSOFT Match	Verizon Business Mismatch	WS/GRANITE TELECOMMUNICATION/MICROSOFT Match	Ws/Granite Telecommunication/Microsoft Match	WS Granite Telecommunication Microsoft Match	Verizon Business Mismatch
65.243.67.62	ARIN	WHOIS	BLACK HOLE NETWORKS, LLC	BLACK HOLE NETWORKS, LLC Match	Verizon Business Mismatch	BLACK HOLE NETWORKS, LLC Match	Black Hole Networks, Llc Match	Black Hole Networks LLC Match	Verizon Business Mismatch
66.173.185.219	ARIN	WHOIS	CAVALIER	CAVALIER Match	Windstream Communications LLC Mismatch	CAVALIER Match	Cavalier Match	Cavalier Match	Windstream Communications LLC Mismatch
67.37.249.133	ARIN	WHOIS	Rkr Dreams Inc	Rkr Dreams Inc Match	AT&T Enterprises, LLC Mismatch	Rkr Dreams Inc Match	Rkr Dreams Inc Match	RKR Dreams Inc Match	AT&T Enterprises, LLC Mismatch
67.117.122.27	ARIN	WHOIS	PATRICIA CRASE	PATRICIA CRASE Match	AT&T Enterprises, LLC Mismatch	Patricia Crase Match	Patricia Crase Match	Patricia Crase Match	AT&T Enterprises, LLC Mismatch
68.140.47.146	ARIN	WHOIS	BARNES AND NOBLE COLLEGE - STORE 792	BARNES AND NOBLE COLLEGE - STORE 792 Match	Verizon Business Mismatch	Barnes and Noble College - Store 792 Match	Barnes and Noble College - Store 792 Match	Barnes and Noble College Store Match	Verizon Business Mismatch
68.214.236.248	ARIN	WHOIS	RMO ADSL EEUA	RMO ADSL EEUA Match	AT&T Enterprises, LLC Mismatch	RMO ADSL EEUA Match	Rmo Adsl Eeua Match	AT&T Corp Mismatch	AT&T Enterprises, LLC Mismatch
69.17.34.55	ARIN	WHOIS	Internet Utilities NA LLC	Rocks Computer Services. LLC Mismatch	Rocks Computer Services, LLC Mismatch	Speakeasy Mismatch	Speakeasy Mismatch	Speakeasy Mismatch	Rocks Computer Services, LLC Mismatch
69.104.223.71	ARIN	WHOIS	Lawndale Elementry	Lawndale Elementry Match	AT&T Enterprises, LLC Mismatch	Lawndale Elementry Match	Lawndale Elementry Match	Lawndale Elementry Match	AT&T Enterprises, LLC Mismatch
69.174.49.52	ARIN	WHOIS	Enlightek, Inc.	Enlightek, Inc. Match	GTT Communications Inc. Mismatch	Enlightek, Inc. Match	Enlightek, Inc. Match	Enlightek Inc Match	GTT Communications Inc. Mismatch
70.159.144.244	ARIN	WHOIS	Property Insurance of Louisiana - MSY LAN	Property Insurance of Louisiana - MSY LAN Match	AT&T Enterprises, LLC Mismatch	Property Insurance of Louisiana - MSY LAN Match	Property Insurance of Louisiana - MSY LAN Match	AT&T Corp Mismatch	AT&T Enterprises, LLC Mismatch
74.241.97.86	ARIN	WHOIS	MSY ADSL EEUA	MSY ADSL EEUA Match	Microsoft Corporation Mismatch	Microsoft Azure Cloud (swedensouth) Mismatch	Msy Adsl Eeua Match	MSY ADSL EEUA Match	Microsoft Corporation Mismatch
76.65.54.119	ARIN	WHOIS	Sympatico HSE	Sympatico HSE Match	Bell Canada Mismatch	Sympatico HSE Match	Sympatico HSE Match	Sympatico HSE Match	Bell Canada Mismatch
76.196.116.211	ARIN	WHOIS	CLEARY BUILDING CORPORATION-070507183137	CLEARY BUILDING CORPORATION-070507183137 Match	AT&T Enterprises, LLC Mismatch	Cleary Building Corporation Match	Cleary Building Corporation Match	Cleary Building Corporation Match	AT&T Enterprises, LLC Mismatch
84.204.234.242	RIPE	WHOIS	North-West branch of OJSC MegaFon	North-West branch of OJSC MegaFon Match	PJSC MegaFon Mismatch	JSC PeterStar Mismatch	JSC PeterStar Mismatch	Kostroma Soyuz Mismatch	PJSC MegaFon Mismatch
85.220.177.191	RIPE	WHOIS	MK Netzdienste GmbH & Co. KG	MK Netzdienste GmbH & Co. KG Match	MK Netzdienste Verwaltungs GmbH trading as MK Netzdienste GmbH & Co. KG Match	SLK Mismatch	Slk Mismatch	Salzlandkreis FD Mismatch	MK Netzdienste Verwaltungs GmbH trading as MK Netzdienste GmbH & Co. KG Match
89.20.78.66	RIPE	WHOIS	Systemec BV	Systemec BV Match	Systemec BV Match	Systemec Customer Ewals Cargo Care Match	Systemec Customer Ewals Cargo Care Match	Ewals Cargo Care Venlo Mismatch	Systemec BV Match
89.227.229.223	RIPE	WHOIS	Completel SAS France	Completel SAS France Match	Societe Francaise Du Radiotelephone - SFR SA Mismatch	Fnac SA F9391 Mismatch	Fnac SA F9391 Mismatch	Completel SAS Match	Societe Francaise Du Radiotelephone - SFR SA Mismatch
92.70.32.72	RIPE	WHOIS	Makelaardij en Assurantien van Munster	Makelaardij en Assurantien van Munster Match	KPN B.V. Mismatch	Makelaardij en Assurantien van Munster Match	Makelaardij en Assurantien van Munster Match	Makelaardij EN Assurantien Van Munster Match	KPN B.V. Mismatch
96.56.240.187	ARIN	WHOIS	PROGRESS DIGNOSTIC IMA	PROGRESS DIGNOSTIC IMA Match	Cablevision Systems Corp. Mismatch	Progress Dignostic IMA Match	Progress Dignostic IMA Match	Progress Dignostic IMA Match	Cablevision Systems Corp. Mismatch
96.57.213.82	ARIN	WHOIS	CSC HOLDINGS, Inc. - Static IP Services	CSC HOLDINGS, Inc. - Static IP Services Match	Cablevision Systems Corp. Mismatch	CSC HOLDINGS, Inc. - Static IP Services Match	CSC HOLDINGS, Inc. - Static IP Services Match	Cablevision Systems Corp Mismatch	Cablevision Systems Corp. Mismatch
99.17.125.205	ARIN	WHOIS	RIGHT CHOICE PUBLISHING-090403165236	RIGHT CHOICE PUBLISHING-090403165236 Match	AT&T Enterprises, LLC Mismatch	Right Choice Publishing Match	Right Choice Publishing Match	Right Choice Publishing Match	AT&T Enterprises, LLC Mismatch
99.23.17.179	ARIN	WHOIS	US GOVT NAVY RECRTNG DIST-090108130827	US GOVT NAVY RECRTNG DIST-090108130827 Match	AT&T Enterprises, LLC Mismatch	US GOVT NAVY RECRTNG DIST Match	Us Govt Navy Recrtng Dist Match	Us Govt Navy Recrtng DIST Match	AT&T Enterprises, LLC Mismatch
99.63.65.167	ARIN	WHOIS	Ionpure Technologies-100301151355	Ionpure Technologies-100301151355 Match	AT&T Enterprises, LLC Mismatch	Ionpure Technologies Match	Ionpure Technologies Match	Ionpure Technologies Match	AT&T Enterprises, LLC Mismatch
104.234.243.252	ARIN	WHOIS	Avitalik Technology Consulting Ltd	Avitalik Technology Consulting Ltd Match	NovoServe Customers ASN Mismatch	Avitalik Technology Consulting Ltd Match	Avitalik Technology Consulting Ltd Match	Avitalik Technology Consulting Ltd Match	NovoServe Customers ASN Mismatch
108.58.183.19	ARIN	WHOIS	NETWOLVE S - TRICORBRA	NETWOLVE S - TRICORBRA Match	Cablevision Systems Corp. Mismatch	Netwolve S - Tricorbra Match	Netwolve S - Tricorbra Match	Netwolve S Tricorbra Match	Cablevision Systems Corp. Mismatch
108.58.216.139	ARIN	WHOIS	RANDY LSCHULMAN	RANDY LSCHULMAN Match	Cablevision Systems Corp. Mismatch	Randy Lschulman Match	Randy Lschulman Match	Randy Lschulman Match	Cablevision Systems Corp. Mismatch
113.36.39.45	JPNIC	WHOIS	GrandBlue CO.Ltd	GrandBlue CO.Ltd Match	ARTERIA Networks Corporation Mismatch	GrandBlue CO.Ltd Match	GrandBlue CO.Ltd Match	Arteria Networks Corporation Mismatch	ARTERIA Networks Corporation Mismatch
116.12.189.132	APNIC	WHOIS	SAFRAN LANDING SYSTEMS SERVICES SINGAPORE PTE LTD	SAFRAN LANDING SYSTEMS SERVICES SINGAPORE PTE LTD Match	SingNet Mismatch	Safran Landing Systems Services Singapore PTE LTD Match	Safran Landing Systems Services Singapore PTE LTD Match	Safran Landing Systems Services Singapore PTE Ltd Match	SingNet Mismatch
128.177.39.107	ARIN	WHOIS	OnRamp Access LCC	OnRamp Access LCC Match	Zayo Bandwidth Mismatch	OnRamp Access LCC Match	OnRamp Access LCC Match	Onramp Access LCC Match	Zayo Bandwidth Mismatch
133.23.30.81	JPNIC	WHOIS	University of Yamanashi	University of Yamanashi Match	Research Organization of Information and Systems, National Institute of Informatics Mismatch	University of Yamanashi Match	University of Yamanashi Match	for Assignment to Jpnic Members Mismatch	Ritsumeikan University Mismatch
133.24.119.250	JPNIC	WHOIS	Yamagata University	Yamagata University Match	Yamagata University Match	Yamagata University Match	— No Data	Yamagata University Match	Yamagata University Match
133.28.188.154	JPNIC	WHOIS	Kanazawa University	Kanazawa University Match	Kanazawa University Match	Kanazawa University Match	— No Data	Kanazawa University Match	Kanazawa University Match
133.31.41.82	JPNIC	WHOIS	Tokyo University of Science	Tokyo University of Science Match	Tokyo University of Science Match	Tokyo University of Science Match	Tokyo University of Science Match	Tokyo University of Science Match	Research Organization of Information and Systems, National Institute of Informatics Mismatch
133.45.216.112	JPNIC	WHOIS	National University Corporation, Nagasaki University	National University Corporation, Nagasaki University Match	Research Organization of Information and Systems, National Institute of Informatics Mismatch	National University Corporation, Nagasaki University Match	National University Corporation, Nagasaki University Match	for Assignment to Jpnic Members Mismatch	Research Organization of Information and Systems, National Institute of Informatics Mismatch
133.75.116.167	JPNIC	WHOIS	National Institute for Fusion Science	National Institute for Fusion Science Match	National Institute for Fusion Science Match	National Institute for Fusion Science Match	— No Data	National Institute for Fusion Science Match	Research Organization of Information and Systems, National Institute of Informatics Mismatch
133.111.79.121	JPNIC	WHOIS	Roland Corporation	Roland Corporation Match	Internet Initiative Japan Inc. Mismatch	Roland Corporation Match	Roland Corporation Match	Internet Initiative Japan Inc Mismatch	Internet Initiative Japan Inc. Mismatch
133.153.186.150	JPNIC	WHOIS	Sumitomo Electric Industries, Ltd.	Sumitomo Electric Industries, Ltd. Match	NTT Communications Corporation Mismatch	NTT Communications Corporation Mismatch	— No Data	NTT Communications Corporation Mismatch	NTT Communications Corporation Mismatch
133.181.182.95	JPNIC	WHOIS	Panasonic Information Systems Co., Ltd	Panasonic Information Systems Co., Ltd Match	Panasonic Information Systems Co., Ltd Match	Jpnic NET JP ERX Mismatch	Jpnic NET JP ERX Mismatch	Asia Pacific Network Information Centre Mismatch	YAMAHA Corporation Mismatch
134.73.148.67	ARIN	WHOIS	Nostalrius	Nostalrius Match	Amazon.com, Inc. Mismatch	Nostalrius Match	Nostalrius Match	Nostalrius Match	Amazon.com, Inc. Mismatch
149.168.82.53	ARIN	WHOIS	Division of Medical Assistance	Division of Medical Assistance Match	State of NC - State Telecommunications Services Mismatch	Division of Medical Assistance Match	Division of Medical Assistance Match	Division of Medical Assistance Match	State of NC - State Telecommunications Services Mismatch
157.66.113.243	IDNIC	WHOIS	Indonesia Online Access	Indonesia Online Access Match	— No Data	PT GIRE INE INDONESIA Mismatch	Pt Gire Ine Indonesia Mismatch	Asia Pacific Network Information Centre Mismatch	PT GIRE INE INDONESIA Mismatch
161.184.197.210	ARIN	WHOIS	ARLENE MEDRIANO	ARLENE MEDRIANO Match	TELUS Communications Inc. Mismatch	Arlene Medriano Match	Arlene Medriano Match	Dial Internet Edmonton Mismatch	TELUS Communications Inc. Mismatch
165.73.128.232	AFRINIC	WHOIS	Assigned to Jackal Creek Estate	Assigned to Jackal Creek Estate Match	Centracom Mismatch	Pindrop Mismatch	Pindrop Mismatch	Assigned to Jackal Creek Estate Match	Centracom Mismatch
173.9.216.23	ARIN	WHOIS	HOLIDAY INN EXPRESS DSR	HOLIDAY INN EXPRESS DSR Match	Comcast Cable Communications, LLC Mismatch	Holiday INN Express DSR Match	Holiday INN Express DSR Match	Holiday Inn Express DSR Match	Comcast Cable Communications, LLC Mismatch
174.89.97.37	ARIN	WHOIS	Sympatico HSE	Sympatico HSE Match	Bell Canada Mismatch	Sympatico HSE Match	Sympatico HSE Match	Sympatico HSE Match	Bell Canada Mismatch
174.95.233.70	ARIN	WHOIS	Sympatico HSE	Sympatico HSE Match	Bell Canada Mismatch	Sympatico HSE Match	Sympatico HSE Match	Bell Canada Mismatch	Bell Canada Mismatch
174.127.19.64	ARIN	WHOIS	California First Funding	California First Funding Match	TPx Communications Mismatch	California First Funding Match	California First Funding Match	California First Funding Match	TPx Communications Mismatch
185.50.214.250	RIPE	WHOIS	TeamPrevent Sante, s.r.o.	TeamPrevent Sante, s.r.o. Match	Orange Slovensko a.s. Mismatch	ORANGE prevsante dc Mismatch	ORANGE prevsante dc Mismatch	Orange Slovensko A.S Mismatch	Orange Slovensko a.s. Mismatch
189.20.241.226	LACNIC	WHOIS	Francisco Adalberto Gimenes Pamplona - ME	Francisco Adalberto Gimenes Pamplona - ME Match	TELEFÔNICA BRASIL S.A Mismatch	Francisco Adalberto Gimenes Pamplona - ME Match	Francisco Adalberto Gimenes Pamplona - ME Match	Telef NICA Brasil S.A Mismatch	TELEFÔNICA BRASIL S.A Mismatch
190.4.46.196	LACNIC	WHOIS	CYBER CAFE GUAIMACA	CYBER CAFE GUAIMACA Match	METRORED S.A. DE C.V. Mismatch	Cyber Cafe Guaimaca Match	Cyber Cafe Guaimaca Match	Metrored S.A de C.V Mismatch	METRORED S.A. DE C.V. Mismatch
190.208.207.148	LACNIC	WHOIS	Telmex Chile S.A WIMAX	Telmex Chile S.A WIMAX Match	Telmex Servicios Empresariales S.A. Mismatch	Telmex Chile S.A WIMAX Match	Telmex Chile S.A WIMAX Match	Telmex Servicios Empresariales S.A Mismatch	Telmex Servicios Empresariales S.A. Mismatch
192.209.32.0	ARIN	WHOIS	State of Washington Department of Revenue	State of Washington Department of Revenue Match	State of Washington Match	State of Washington Department of Revenue Match	State of Washington Department of Revenue Match	State of Washington Department of Revenue Match	State of Washington Match
195.226.158.84	RIPE	WHOIS	Vets4Pets	Vets4Pets Match	JT (Jersey) Limited Mismatch	Vets4Pets Match	Vets4Pets Match	JT Limited Mismatch	JT (Jersey) Limited Mismatch
198.12.101.143	ARIN	WHOIS	Connor Slayton	Connor Slayton Match	HostPapa Mismatch	Connor Slayton Match	Connor Slayton Match	— No Data	HostPapa Mismatch
198.35.148.0	ARIN	WHOIS	Board of Governors of the Federal Reserve System	Board of Governors of the Federal Reserve System Match	— No Data	Board of Governors of the Federal Reserve System Match	Board of Governors of the Federal Reserve System Match	— No Data	Board of Governors of the Federal Reserve System Match
199.9.1.189	ARIN	WHOIS	Naval Research Laboratory, Marine	Naval Research Laboratory, Marine Match	United States Department of Defense (DoD) Mismatch	Naval Research Laboratory, Marine Match	Naval Research Laboratory, Marine Match	Naval Research Laboratory Marine Match	DoD Network Information Center Mismatch
199.227.202.171	ARIN	WHOIS	Birmingham Jefferson Convention Complex	Birmingham Jefferson Convention Complex Match	Level 3 Parent, LLC Mismatch	Birmingham Jefferson Convention Complex Match	Birmingham Jefferson Convention Complex Match	Birmingham Jefferson Convention Complex Match	Level 3 Parent, LLC Mismatch
202.154.57.113	IDNIC	WHOIS	Surabaya Branch IP Addresses 2	Surabaya Branch IP Addresses 2 Match	PT Rahajasa Media Internet Mismatch	RADNET-SBY Mismatch	— No Data	Pt Rahajasa Media Internet Mismatch	PT Rahajasa Media Internet Mismatch
203.182.241.167	JPNIC	WHOIS	InterVia	InterVia Match	NTT DATA CORPORATION Mismatch	InterVia Match	InterVia Match	NTT Data Corporation Mismatch	NTT DATA CORPORATION Mismatch
203.230.3.94	KRNIC	WHOIS	SungKyunKwan University (SKKU)	SungKyunKwan University (SKKU) Match	KISTI Mismatch	KREONet Mismatch	KREONet Mismatch	Asia Pacific Network Information Centre Mismatch	KISTI Mismatch
203.237.232.147	KRNIC	WHOIS	BUSAN NATIONAL UNIVERSITY OF EDUCATION	BUSAN NATIONAL UNIVERSITY OF EDUCATION Match	Korea Telecom Mismatch	Busan National University of Education Match	Busan National University of Education Match	Korea Telecom Mismatch	Geumgang University Mismatch
204.132.213.165	ARIN	WHOIS	Johnson, Ruddy, Norman & McConaty	Johnson, Ruddy, Norman & McConaty Match	CenturyLink Communications, LLC Mismatch	Johnson, Ruddy, Norman & McConaty Match	Johnson, Ruddy, Norman & McConaty Match	Johnson Ruddy Norman & Mcconaty Match	CenturyLink Communications, LLC Mismatch
204.249.154.147	ARIN	WHOIS	Merrimack Education Center	Dracut High School Mismatch	Cogent Communications, LLC Mismatch	Dracut High School Mismatch	Dracut High School Mismatch	Dracut High School Mismatch	Cogent Communications Mismatch
205.232.255.201	ARIN	WHOIS	NYS DEPARTMENT OF ECONOMIC DEVELOPMENT	NYS DEPARTMENT OF ECONOMIC DEVELOPMENT Match	Windstream Communications LLC Mismatch	NYS DEPARTMENT OF ECONOMIC DEVELOPMENT Match	Nys Department Of Economic Development Match	Windstream Communications LLC Mismatch	Windstream Communications LLC Mismatch
207.35.211.208	ARIN	WHOIS	Royal Canadian Mounted Police RCMP	Royal Canadian Mounted Police RCMP Match	Bell Canada Mismatch	Royal Canadian Mounted Police RCMP Match	Royal Canadian Mounted Police RCMP Match	Royal Canadian Mounted Police RCMP Match	Bell Canada Mismatch
207.151.22.71	ARIN	WHOIS	USC-University Hospital	USC-University Hospital Match	USC-University Hospital Match	University of Southern California Mismatch	University of Southern California Mismatch	Los Nettos Mismatch	USC-University Hospital Match
207.203.226.242	ARIN	WHOIS	DMS: Dept. Banking and Finan	DMS: Dept. Banking and Finan Match	AT&T Enterprises, LLC Mismatch	DMS: Dept. Banking and Finan Match	DMS: Dept. Banking and Finan Match	DMS Dept Banking and Finan Match	AT&T Enterprises, LLC Mismatch
207.214.30.196	ARIN	WHOIS	The 415 Group	The 415 Group Match	AT&T Enterprises, LLC Mismatch	The 415 Group Match	The 415 Group Match	The 415 Group Match	AT&T Enterprises, LLC Mismatch
208.11.180.65	ARIN	WHOIS	Sprint Midatlantic Telecom	Sprint Midatlantic Telecom Match	Cogent Communications, LLC Mismatch	Always Online Mismatch	Always Online Mismatch	Always Online Mismatch	CenturyLink Communications, LLC Mismatch
208.46.227.136	ARIN	WHOIS	THE BILL & MELINDA GATES FOUND	THE BILL & MELINDA GATES FOUND Match	CenturyLink Communications, LLC Mismatch	THE BILL & MELINDA GATES FOUND Match	The Bill & Melinda Gates Found Match	The Bill & Melinda Gates Found Match	CenturyLink Communications, LLC Mismatch
208.47.213.175	ARIN	WHOIS	Universo Online International	Universo Online International Match	CenturyLink Communications, LLC Mismatch	Universo Online International Match	Universo Online International Match	Universo Online International Match	CenturyLink Communications, LLC Mismatch
208.192.194.229	ARIN	WHOIS	Proto Source	Proto Source Match	Verizon Business Mismatch	Proto Source Match	Proto Source Match	Verizon Business Mismatch	Verizon Business Mismatch
208.209.169.205	ARIN	WHOIS	Vornado Air Circulation Systems	Vornado Air Circulation Systems Match	Verizon Business Mismatch	Vornado Air Circulation Systems Match	Vornado Air Circulation Systems Match	Verizon Business Mismatch	Verizon Business Mismatch
208.214.43.238	ARIN	WHOIS	VisionWeb Hosting, Inc.	VisionWeb Hosting, Inc. Match	Verizon Business Mismatch	VisionWeb Hosting, Inc. Match	VisionWeb Hosting, Inc. Match	Verizon Business Mismatch	Verizon Business Mismatch
209.156.114.80	ARIN	WHOIS	DELAWARE VALLEY COLLEGE	DELAWARE VALLEY COLLEGE Match	Windstream Communications LLC Mismatch	Delaware Valley College Match	Delaware Valley College Match	Delaware Valley College Match	Windstream Communications LLC Mismatch
213.14.72.168	RIPE	WHOIS	Superonline Iletisim Hizmetleri A.S.	Superonline Iletisim Hizmetleri A.S. Match	Superonline Iletisim Hizmetleri A.S. Match	Superonline Iletisim Hizmetleri Match	Superonline Iletisim Hizmetleri Match	Smart Vision Insaat Dis Ticaret Limited Sirketi Mismatch	Superonline Iletisim Hizmetleri A.S. Match
215.76.131.94	ARIN	WHOIS	US EUROPEAN COMMAND	US EUROPEAN COMMAND Match	United States Department of Defense (DoD) Mismatch	DoD Network Information Center Mismatch	— No Data	DOD Network Information Center Mismatch	DoD Network Information Center Mismatch
216.8.153.133	ARIN	WHOIS	Arcelor Mittal Windsor	Arcelor Mittal Windsor Match	Managed Network Systems Inc. Mismatch	Arcelor Mittal Windsor Match	Arcelor Mittal Windsor Match	Internet Kent Mismatch	Managed Network Systems Inc. Mismatch
216.60.235.233	ARIN	WHOIS	Fast Data	Fast Data Match	AT&T Enterprises, LLC Mismatch	Fast Data Match	Fast Data Match	Fast Data Match	AT&T Enterprises, LLC Mismatch
216.117.28.183	ARIN	WHOIS	CentreTechnologies	CentreTechnologies Match	CyrusOne LLC Mismatch	CentreTechnologies Match	CentreTechnologies Match	Centretechnologies Match	CyrusOne LLC Mismatch
216.201.61.95	ARIN	WHOIS	Bascom Mutual Telephone Company	Bascom Mutual Telephone Company Match	Com Net, Inc. Mismatch	Bascom Mutual Telephone Company Match	Bascom Mutual Telephone Company Match	Bascom Mutual Telephone Company Match	Com Net, Inc. Mismatch
216.240.105.40	ARIN	WHOIS	Dan Smith	Dan Smith Match	— No Data	Dan Smith Match	Dan Smith Match	Dan Smith Match	Dan Smith Match
219.240.89.227	KRNIC	WHOIS	Guri City Hall	Guri City Hall Match	SK Broadband Co Ltd Mismatch	broadNnet Mismatch	broadNnet Mismatch	SK Broadband Co Ltd Mismatch	SK Broadband Co Ltd Mismatch
220.68.106.17	KRNIC	WHOIS	Honam Theological University & Seminary	Honam Theological University & Seminary Match	LG DACOM Corporation Mismatch	Honam Theological University & Seminary Match	Honam Theological University & Seminary Match	Lg Dacom Corporation Mismatch	Korea University of Technology and Education Mismatch
221.142.58.30	KRNIC	WHOIS	Chungang University	Chungang University Match	SK Broadband Co Ltd Mismatch	SK Broadband Co Ltd Mismatch	SK Broadband Co Ltd Mismatch	SK Broadband Co Ltd Mismatch	SK Broadband Co Ltd Mismatch

Download the machine-readable results as JSON: ip-company-comparison-2025-aggregated.json

Conclusion

Every provider received the same 109 IP addresses and the same WHOIS ground truth. Only ipapi.is consistently returns the customer organisation; most competitors fall back to ISP umbrellas or wrong company data.

Ranking the services by how often they matched the ground truth company:

ipapi.is – 107 / 109 (98.2%). Almost perfect accuracy in most cases, shows ability to handle most WHOIS record formats.
ip-api.com – 89 / 109 (81.7%). High accuracy in most cases, shows ability to handle most WHOIS record formats.
db-ip.com – 87 / 109 (79.8%). High accuracy in most cases, shows ability to handle most WHOIS record formats.
ipdata.co – 58 / 109 (53.2%). Average performance, not too bad.
ipinfo.io – 10 / 109 (9.2%). Very poor performance. ipinfo.io does not seem to be able to handle more fringe and niche cases of WHOIS record formats such as CustName WHOIS records or other non-standard formats.
ipbase.com – 9 / 109 (8.3%). Very poor performance. ipbase.com maintainers do not seem to know that there are more than the standard WHOIS record formats.

For teams that rely on precise customer attribution for abuse filtering, compliance or personalisation, this ranking shows why a correct WHOIS foundation matters. When the company object is wrong, every enrichment layer built on top inherits that mistake.