Autonomous System

AS6431 AT&T Enterprises, LLC

ISPActiveUnited StatesARIN

AS6431 (ATT-RESEARCH) is an ISP network operated by AT&T Enterprises, LLC in United States, registered with ARIN. It has 15 IPv4 prefixes with 396,800 addresses and 6 IPv6 prefixes, which makes it the 781st largest of 82,141 active autonomous systems by IPv4 space.

IPv4 addresses396,800in 15 prefixes
IPv6 prefixes6≈ 2.3 × 10²⁶ addresses
Size rank#781of 82,141 active ASNs
Abuser scoreVery Lowunder 0.01% of its addresses flagged · method

Details

OrganizationAT&T Enterprises, LLC
AS nameATT-RESEARCH
Websiteatt.com
Country United States (US)
Network typeISP
RegistryARIN
Abuse contactabuse@att.net
Registered1996-04-12
Last updated2025-03-18

IPv4 prefixes

15 prefixes · 396,800 addresses
NetworkAddressesFirst – last address
135.197.0.0/1665,536135.197.0.0 – 135.197.255.255
135.205.0.0/1665,536135.205.0.0 – 135.205.255.255
135.207.0.0/1665,536135.207.0.0 – 135.207.255.255
135.197.0.0/1732,768135.197.0.0 – 135.197.127.255
135.197.128.0/1732,768135.197.128.0 – 135.197.255.255
135.205.0.0/1732,768135.205.0.0 – 135.205.127.255
135.205.128.0/1732,768135.205.128.0 – 135.205.255.255
135.207.0.0/1732,768135.207.0.0 – 135.207.127.255
135.207.128.0/1732,768135.207.128.0 – 135.207.255.255
204.178.8.0/212,048204.178.8.0 – 204.178.15.255
12.106.32.0/2351212.106.32.0 – 12.106.33.255
12.106.34.0/2425612.106.34.0 – 12.106.34.255
12.106.35.0/2425612.106.35.0 – 12.106.35.255
192.20.225.0/24256192.20.225.0 – 192.20.225.255
207.76.218.0/24256207.76.218.0 – 207.76.218.255

IPv6 prefixes

6 prefixes
  • 2620:0:f00::/41
  • 2620:0:f40::/44
  • 2620:0:f50::/44
  • 2620:0:f60::/44
  • 2620:0:f70::/44
  • 2620:0:f01::/48

Query AS6431 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=AS6431&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS6431, with or without a key:

curl "https://api.ipapi.is/?q=135.197.0.1"

Other networks of AT&T Enterprises, LLC

6 of 15
AS7018 AT&T Enterprises, LLC117,261,568 IPv4 addressesAS20057 AT&T Enterprises, LLC6,499,584 IPv4 addressesAS6389 AT&T Enterprises, LLC4,523,776 IPv4 addressesAS14654 AT&T Enterprises, LLC1,694,208 IPv4 addressesAS2686 AT&T Enterprises, LLC1,411,072 IPv4 addressesAS2687 AT&T Enterprises, LLC759,040 IPv4 addresses

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