Autonomous System

AS42908 O2 Czech Republic, a.s.

ISPActiveCzechiaRIPE

AS42908 (CZ-NORDICTELECOMREGIONAL) is an ISP network operated by O2 Czech Republic, a.s. in Czechia, registered with RIPE. It has 35 IPv4 prefixes with 183,296 addresses and 9 IPv6 prefixes, which makes it the 1,398th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses183,296in 35 prefixes
IPv6 prefixes9≈ 2.9 × 10³⁰ addresses
Size rank#1,398of 82,200 active ASNs
Abuser scoreLow0.19% of its addresses flagged · method

Details

OrganizationO2 Czech Republic, a.s.
AS nameCZ-NORDICTELECOMREGIONAL
Websiteo2.cz
Country Czechia (CZ)
Network typeISP
RegistryRIPE
Abuse contactabuse@o2.cz
Registered2007-05-09
Last updated2025-04-01

IPv4 prefixes

35 prefixes · 183,296 addresses
NetworkAddressesFirst – last address
213.19.0.0/1732,768213.19.0.0 – 213.19.127.255
78.136.128.0/1816,38478.136.128.0 – 78.136.191.255
94.241.64.0/1816,38494.241.64.0 – 94.241.127.255
213.250.192.0/1816,384213.250.192.0 – 213.250.255.255
88.81.64.0/198,19288.81.64.0 – 88.81.95.255
91.187.32.0/198,19291.187.32.0 – 91.187.63.255
109.108.96.0/198,192109.108.96.0 – 109.108.127.255
176.102.128.0/198,192176.102.128.0 – 176.102.159.255
213.155.32.0/198,192213.155.32.0 – 213.155.63.255
5.102.48.0/204,0965.102.48.0 – 5.102.63.255
80.87.176.0/204,09680.87.176.0 – 80.87.191.255
80.90.128.0/204,09680.90.128.0 – 80.90.143.255
80.251.240.0/204,09680.251.240.0 – 80.251.255.255
92.61.80.0/204,09692.61.80.0 – 92.61.95.255
178.17.80.0/204,096178.17.80.0 – 178.17.95.255
217.170.96.0/204,096217.170.96.0 – 217.170.111.255
217.196.112.0/204,096217.196.112.0 – 217.196.127.255
217.197.144.0/204,096217.197.144.0 – 217.197.159.255
31.10.56.0/212,04831.10.56.0 – 31.10.63.255
46.183.56.0/212,04846.183.56.0 – 46.183.63.255
46.231.72.0/212,04846.231.72.0 – 46.231.79.255
77.95.192.0/212,04877.95.192.0 – 77.95.199.255
93.92.48.0/212,04893.92.48.0 – 93.92.55.255
93.93.32.0/212,04893.93.32.0 – 93.93.39.255
45.159.116.0/221,02445.159.116.0 – 45.159.119.255
The 25 largest of 35. The API and the database have all of them.

IPv6 prefixes

9 prefixes
  • 2a01:9f40::/29
  • 2a02:2588::/29
  • 2a07:cc80::/29
  • 2a0c:8b40::/29
  • 2a00:e4c0::/32
  • 2a02:2428::/32
  • 2a03:1600::/32
  • 2a03:7a00::/32
  • 2a03:a820::/32

Query AS42908 with the API

The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day. 

curl "https://api.ipapi.is/?q=AS42908&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS42908, with or without a key:

curl "https://api.ipapi.is/?q=213.19.0.1"

Other networks of O2 Czech Republic, a.s.

AS5610 O2 Czech Republic, a.s.2,327,808 IPv4 addressesAS16246 O2 Czech Republic, a.s.133,120 IPv4 addressesAS31246 O2 Czech Republic, a.s.66,560 IPv4 addressesAS12570 O2 Czech Republic, a.s.53,760 IPv4 addressesAS41046 O2 Czech Republic, a.s.53,248 IPv4 addressesAS29321 O2 Czech Republic, a.s.15,360 IPv4 addresses

Largest networks in Czechia

AS5610 O2 Czech Republic, a.s.2,327,808 IPv4 addressesAS16019 Vodafone Czech Republic a.s.1,210,368 IPv4 addressesAS13036 T-Mobile Czech Republic a.s.992,256 IPv4 addressesAS2852 CESNET z.s.p.o.858,112 IPv4 addressesAS44546 ALFA TELECOM s.r.o.527,616 IPv4 addressesAS2571 DHL Information Services (Europe) s.r.o438,528 IPv4 addresses