asn.dev

Autonomous system

AS4473 ATTIS-ASN4473

Unclassified ARIN

IPv4 addresses 78.34K 21 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Flagged prefixes 0 none

Summary

AT&T Internet Services

United States · AI-generated

enterprise legacy

ATTIS-ASN4473 — an AT&T Internet Services autonomous system, registered with

ARIN in 1995 and held today by AT&T Enterprises, LLC.

What it's used for

  • Announcing several dozen AT&T prefixes, largely carved out of AT&T's legacy 12.0.0.0/8, for enterprise and managed customer networks.
  • One of many ASNs AT&T maintains alongside its main backbone ([AS7018](https://asn.ipinfo.app/AS7018)) for specific service segments.

Notable

  • Business address space, not consumer broadband: the /24s here look like customer and service assignments rather than subscriber pools.
  • The wide spread of small prefixes is typical of an ASN used to originate enterprise customer routes out of a carrier's own aggregate.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Address space

Summary

Full explorer
CountryNamePrefixes
USUnited States of America21

Registry

Allocation record

via ARIN RDAP
Registry
ARIN
Handle
AS4473
Registry name
ATTIS-ASN4473
Registrant
AT&T Enterprises, LLC
Abuse contact
abuse@att.net
Registered
1995-03-08
Last changed
2024-12-05
Status
active

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

No IC3 indicators Nothing from the FBI IC3 feed.

Threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check