Autonomous system
AS7018 ATT-INTERNET4
Residential DROP-listed space ARIN NSP
Summary
AT&T
isp eyeball backbone
AT&T's main US network (ATT-INTERNET4) — one of the largest access and backbone networks in the United States.
What it's used for
- Consumer and business fixed broadband (DSL and fibre) and a large national IP backbone; AT&T mobile largely uses separate ASNs.
Notable
- A huge "eyeball" network with one of the biggest IPv4 footprints anywhere.
- As a former Bell System heir, AT&T's network is a spine of US telecommunications.
Interesting
- The AT&T name and network trace back through the breakup and later re-consolidation of the original Bell telephone monopoly.
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
15 upstream, 2,283 downstream and 2,282 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-10, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 7,667 prefixes · 90.00M addresses IPv6 281 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 7,948 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS7018- Registry name
- ATT-INTERNET4
- Registrant
- AT&T Enterprises, LLC
- Abuse contact
- abuse@att.net
- Registered
- 1996-07-30
- Last changed
- 2025-03-18
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- AT&T US - 7018
- Network type
- NSP
- Scope
- North America
- Traffic ratio
- Mostly Inbound
- Peering policy
- Selective
- Website
- http://www.att.com
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 55% valid · 355 valid, 287 with no ROA 2 RPKI-invalid
- ROAs
- 968 authorising AS7018
- ASPA
- 1 declared providers
- IRR
- 28% registered · 183 of 644 announcements 70 other origin
- Route objects
- 1,250 naming AS7018
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
22 DROP matches Announced space overlapping the DROP prefix list.
| Announced | DROP entry | Record |
|---|---|---|
| 199.106.0.0/18 | 199.106.8.0/21 | SBL642241 |
| 199.107.96.0/20 | 199.107.96.0/22 | SBL635119 |
| 199.107.128.0/19 | 199.107.152.0/21 | SBL672877 |
| 199.108.192.0/19 | 199.108.212.0/22 | SBL624891 |
| 199.108.232.0/21 | 199.108.236.0/22 | SBL624892 |
| 199.186.24.0/22 | 199.186.26.0/23 | SBL673042 |
| 204.146.192.0/18 | 204.146.240.0/20 | SBL623101 |
| 206.121.0.0/16 | 206.121.28.0/22 | SBL673043 |
| 206.121.0.0/16 | 206.121.32.0/23 | SBL673044 |
| 206.170.48.0/20 | 206.170.48.0/21 | SBL624903 |
| 206.170.48.0/20 | 206.170.56.0/22 | SBL624904 |
| 207.105.0.0/17 | 207.105.108.0/22 | SBL624906 |
| 207.252.128.0/19 | 207.252.136.0/21 | SBL642247 |
| 209.79.128.0/17 | 209.79.220.0/22 | SBL624912 |
| 209.186.0.0/18 | 209.186.20.0/22 | SBL623895 |
| 209.186.0.0/18 | 209.186.24.0/21 | SBL623894 |
| 209.186.224.0/20 | 209.186.224.0/21 | SBL623903 |
| 209.186.224.0/20 | 209.186.232.0/22 | SBL623904 |
| 209.186.224.0/20 | 209.186.236.0/24 | SBL623905 |
| 209.233.128.0/19 | 209.233.156.0/22 | SBL645263 |
| 216.63.240.0/21 | 216.63.240.0/22 | SBL624913 |
| 2a06:b440::/32 | 2a06:b440::/29 | SBL654213 |
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 431 networks and 1,775 prefixes, as published 2026-10-11. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
1 IC3 indicators addresses in this network appear in FBI IC3 cybersecurity advisories.
| Prefix | Advisory | Published |
|---|---|---|
206.19.67.207 | China-Linked Hacking Group QTFY Targets Military and Critical Infrastructure with Malicious Distributed Systems | 2026-08-26 |
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere