AS4466 — EASYLINK2

AS4466 announces 1 IPv4 prefixes covering 256 addresses and 1 IPv6 prefixes.

About this network

One of several AT&T autonomous systems, registered with ARIN in 1995 and today held by AT&T Enterprises, LLC. The EASYLINK2 handle is a survivor from AT&T's EasyLink messaging business.

What it's used for

• Announcing a small set of AT&T-held prefixes, including space from AT&T's legacy 12.0.0.0/8 block, in support of enterprise and managed services.
• A niche, low-prefix-count ASN rather than one of AT&T's large backbone or broadband networks.

Notable

• Corporate address space: the routes here serve business services, not residential eyeball traffic.
• AT&T operates many separate ASNs; the EasyLink-named pair sits alongside AS4468 with sequential handles from the same 1995 registration batch.

Interesting

• EasyLink was an early commercial electronic-messaging service (email, fax, telex) that AT&T acquired from Western Union in 1990. The service itself later passed through other owners, but the ASN handle stayed behind at AT&T.

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

Announced prefixes

• 204.127.196.0/24
• 2620:32::/48

Upstream networks

• AS7018 AT&T Enterprises, LLC

Adjacent networks

• AS7018 AT&T Enterprises, LLC

Routing security

• RPKI: 0 valid, 0 invalid and 2 not-found announcements; 0 ROAs.
• ASPA: 1 authorised providers.
• IRR: 0% of announcements registered; 1 route objects.
• Listed in as-sets: AS-ANC-CUSTOMER-PROXY-REGISTER, AS3491:AS-CUSTOMERS-AP, AS3491:AS-CUSTOMERS-TEST.