AS3423 — ATTIS-ASN3423

AS3423 announces 9 IPv4 prefixes covering 3,328 addresses and 1 IPv6 prefixes.

About this network

ATTIS-ASN3423 is held by AT&T Enterprises, LLC, the entity that holds AT&T's ARIN registrations. It is one of many AT&T AS numbers, and a small one: its announced footprint is a few thousand IPv4 addresses.

What it's used for

• Part of AT&T's wider ASN estate, alongside its main backbone AS AS7018.
• A limited set of prefixes rather than a broad consumer or backbone network, which points to internal or specific-service use rather than mass eyeball broadband.

Notable

• Large carriers accumulate dozens of AS numbers through decades of mergers, acquisitions, and separate business units. Not all of them carry meaningful traffic volume.
• The ATTIS handle and the low number both date the registration to the mid 1990s, well before AT&T's modern network took its present shape.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 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
• 2610:e8::/32

Upstream networks

• AS7018 AT&T Enterprises, LLC

Adjacent networks

• AS7018 AT&T Enterprises, LLC
• AS13979 AT&T Enterprises, LLC

Routing security

• RPKI: 0 valid, 0 invalid and 13 not-found announcements; 27 ROAs.
• ASPA: none published.
• IRR: 0% of announcements registered; 25 route objects.