AS3423 AT&T Enterprises, LLC

ATTIS-ASN3423 - AT&T Enterprises, LLC · registered in the United States

IPv4 addresses3,3289 prefixes · <0.001% of announced IPv4

Rank in United States#5,115largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#17,413of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryUnited States18,679 ASNs registered there

Open AS3423 in ASN lookup Look up an IP in this network (12.96.43.1) All networks in United States

IPv4 prefixes

All 9 prefixes, in address order.

12.96.43.0/24
12.96.44.0/24
157.96.84.0/23
157.96.86.0/24
165.224.128.0/22
165.224.132.0/24
165.224.134.0/24
165.224.136.0/24
165.224.140.0/24

IPv6 prefixes

All 1 prefix.

2610:e8::/32

Other ASNs named AT&T Enterprises, LLC

24 other networks use the same organisation name; together with AS3423 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

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

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

AS8254#5112 ROUTE95 GREEN FLOID LLC3,328

AS41625#5113 ETSERVICE-AS Express Teleservice Corp3,328

AS11588#5114 LAMBDA-BB - Lambda3,328

AS16409#5116 PBW-COMMUNICATIONS - PBW Communications, LLC3,328

AS16715#5117 ARISTOTLE-ASN - Aristotle Internet Access3,328

AS22121#5118 TOPSHAM-COMMUNICATIONS - Topsham Communications LLC3,328

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