Autonomous system
AS4185 ATTIS-ASN4185 - AT&T Enterprises, LLC
Unclassified ARIN
Summary
AT&T Enterprises, LLC
enterprise isp legacy
ATTIS-ASN4185 is registered to AT&T Enterprises, LLC. The handle reflects its origin as an AT&T Internet Services network, and it is one of many AS numbers AT&T operates.
What it's used for
- Carrying enterprise and managed-service customer networks rather than acting as one of AT&T's main backbone or consumer-broadband ASNs.
- The announced prefixes are a mix of slices out of AT&T's own
12.0.0.0/8and several customer-sized/16blocks, which is the shape of dedicated business internet access and managed hosting rather than a residential eyeball pool.
Notable
- AT&T runs a large family of AS numbers; this one is a secondary member of that family, so its footprint (a couple hundred thousand addresses) is far smaller than AT&T's flagship networks.
- The organization record was updated in a recent corporate reorganization, but the AS number itself has been AT&T-side since the mid-1990s. The low number is genuine, not a reissue to a new holder.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 0 downstream and 4 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS7018 | AT&T Enterprises, LLC | 797 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 32 prefixes · 131K addresses IPv6 3 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 35 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS4185- Registry name
- ATTIS-ASN4185
- Registrant
- AT&T Enterprises, LLC
- Abuse contact
- abuse@att.net
- Registered
- 1994-12-16
- Last changed
- 2024-12-05
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 25% valid · 4 valid, 12 with no ROA
- ROAs
- 10 authorising AS4185
- ASPA
- no ASPA record
- IRR
- 13% registered · 2 of 16 announcements 1 other origin
- Route objects
- 7 naming AS4185
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 453 networks and 1,846 prefixes, as published 2026-11-11. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere