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AS6431 AT&T Enterprises, LLC

ATT-RESEARCH - AT&T Enterprises, LLC · registered in the United States

IPv4 addresses200,1927 prefixes · 0.006% of announced IPv4
Rank in United States#319largest network in US by IPv4 space, of 18,338 · 0.01% of US
Rank worldwide#1,083of 79,396 networks with IPv4
IPv6128 x /487 prefixes
CountryUnited States18,679 ASNs registered there
Open AS6431 in ASN lookup Look up an IP in this network (12.106.32.1) All networks in United States

IPv4 prefixes

All 7 prefixes, in address order.

  • 12.106.32.0/22
  • 135.197.0.0/16
  • 135.205.0.0/16
  • 135.207.0.0/16
  • 192.20.225.0/24
  • 204.178.8.0/21
  • 207.76.218.0/24

IPv6 prefixes

All 7 prefixes.

  • 2620:0:f00::/47
  • 2620:0:f02::/47
  • 2620:0:f04::/46
  • 2620:0:f08::/45
  • 2620:0:f10::/44
  • 2620:0:f20::/43
  • 2620:0:f40::/42

Other ASNs named AT&T Enterprises, LLC

24 other networks use the same organisation name; together with AS6431 they announce 103,072,004 IPv4 addresses.

ASNNameIPv4 addresses
AS7018ATT-INTERNET4 - AT&T Enterprises, LLC US90,002,688
AS6389BELLSOUTH-NET-BLK - AT&T Enterprises, LLC US4,237,056
AS20057ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC US3,979,776
AS2686ATGS-MMD-AS - AT&T Enterprises, LLC US1,370,368
AS14654WAYPORT - AT&T Enterprises, LLC US916,480
AS2687ATGS-MMD-AS - AT&T Enterprises, LLC US727,040
AS7287PBI-NET-BLK2 - AT&T Enterprises, LLC US420,864
AS2688ATGS-MMD-AS - AT&T Enterprises, LLC US345,600
AS19957STATE-OF-TENNESSEE-NETTN - AT&T Enterprises, LLC US291,072
AS2386INS-AS - AT&T Enterprises, LLC US272,128
AS4185ATTIS-ASN4185 - AT&T Enterprises, LLC US131,328
AS2685ATGS-MMD-AS - AT&T Enterprises, LLC US94,464
AS25993ATT-LABS-AUSTIN-TX - AT&T Enterprises, LLC US44,288
AS4473ATTIS-ASN4473 - AT&T Enterprises, LLC US12,800
AS5671PBI-NET-BLK - AT&T Enterprises, LLC US8,448
AS5672PBI-NET-BLK - AT&T Enterprises, LLC US5,376
AS13965SBCIS-FYTVAR - AT&T Enterprises, LLC US4,096
AS3423ATTIS-ASN3423 - AT&T Enterprises, LLC US3,328
AS4468EASYLINK4 - AT&T Enterprises, LLC US1,536
AS6269ATT-INTERNET2 - AT&T Enterprises, LLC US1,280
AS7291SBIS-BLK - AT&T Enterprises, LLC US1,024
AS5728WORLDNET1 - AT&T Enterprises, LLC US512
AS4466EASYLINK2 - AT&T Enterprises, LLC US256
AS13979ATT-IPFR - AT&T Enterprises, LLC US4

Similar-sized networks in United States

ASNNameIPv4 addresses
AS36850#316 UNC-CH - University of North Carolina at Chapel Hill203,264
AS1637#317 DNIC-AS-01637 - Headquarters, USAISC201,728
AS400619#318 AROSS-AS - AROSSCLOUD INC.201,472
AS25#320 UCB - University of California at Berkeley199,940
AS1602#321 DNIC-AS-01602 - Headquarters, USAISC199,936
AS30449#322 AZSTATE - State of Arizona199,168

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources