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AS5671 AT&T Enterprises, LLC

PBI-NET-BLK - AT&T Enterprises, LLC · registered in the United States

IPv4 addresses8,4487 prefixes · <0.001% of announced IPv4
Rank in United States#3,209largest network in US by IPv4 space, of 18,338 · <0.01% of US
Rank worldwide#10,067of 79,396 networks with IPv4
IPv6noneno IPv6 routes announced
CountryUnited States18,679 ASNs registered there
Open AS5671 in ASN lookup Look up an IP in this network (66.143.174.1) All networks in United States

IPv4 prefixes

All 7 prefixes, in address order.

  • 66.143.174.0/24
  • 198.225.128.0/20
  • 198.225.144.0/21
  • 198.225.152.0/22
  • 198.225.156.0/23
  • 198.225.158.0/24
  • 198.225.159.0/24

Other ASNs named AT&T Enterprises, LLC

24 other networks use the same organisation name; together with AS5671 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
AS6431ATT-RESEARCH - AT&T Enterprises, LLC US200,192
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
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
AS186#3206 CUA-AS - The Catholic University of America8,448
AS3364#3207 CSDCO-AS - Computer Systems Design Company8,448
AS4364#3208 IGLOU - IgLou Internet Services8,448
AS7054#3210 MERCK - Merck and Co., Inc.8,448
AS7148#3211 GRAPHNET-NET - Graphnet, Inc.8,448
AS8137#3212 DISNEYONLINE-AS - Disney Worldwide Services, Inc.8,448

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