subnet.im

AS7018AT&T Enterprises, LLC

United StatesRegistryARINTypeT1

As of 26th September 2026, AS7018 (AT&T Enterprises, LLC), a tier-1 transit network registered in the United States with ARIN, originates 629 IPv4 prefixes covering 117M addresses and 15 IPv6 prefixes. By IPv4 address space that makes it the 3rd-largest of the 79,480 networks we see originating IPv4, and the 3rd-largest of 18,421 in the United States. It is seen behind 18 upstream networks, most often AS2914 (NTT America, Inc.) and AS3356 (Lumen (Level 3)), and in front of 2,301 downstream networks. 55% of its announcements have a valid RPKI ROA; 1 is RPKI-invalid. Over 99% of its routes reach at least 90% of full-feed peers, and 5 prefixes are also originated by another network.

At a glance

IPv4 prefixes

629

IPv6 prefixes

15

IPv4 addresses

117M

IPv6 /64s

2.3T

Upstream graph

The networks AS7018 is seen behind, one and two hops out, drawn from real AS paths.

AS7018Toward the internet core
Upstream graph for AS7018: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS7018AT&T Enterprises,…This networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3356Lumen (Level 3)AS6939Hurricane Electri…AS151326DCConnect Communi…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS3130RGnet OUAS49544i3D.net B.VAS3549Lumen (fka. Globa…AS20130Depaul University

Networks observed one and two hops upstream of AS7018 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

4,654

adjacent networks

Upstreams
180%
Peers
2,33550%
Downstreams
2,30149%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS7018
NetworkCountryRelationshipPathsVantage pts
AS2914NTT America, Inc.USPeer121,70254
AS3356Lumen (Level 3)USPeer119,27252
AS1299Arelion (fka. Telia Carrier)SEPeer109,16350
AS174Cogent Communications, LLCUSPeer59,77043
AS6939Hurricane Electric LLCUSPeer45,94923
AS3257GTT Communications Inc.USPeer40,23523
AS3491PCCW Global (HK) Ltd.HKPeer35,37413
AS6453TATA Communications (America) IncUSPeer34,54328
AS2497Internet Initiative Japan Inc.JPPeer29,8375
AS6762Telecom Italia Sparkle (Seabone)ITPeer28,56023

Prefixes

All 644

The largest blocks AS7018 originates, widest first.

Largest prefixes originated by AS7018
PrefixAddressesVisibility
12.0.0.0/816.8M80/81
12.0.0.0/98.4M80/81
12.128.0.0/98.4M80/81
32.0.0.0/98.4M80/81
107.64.0.0/104.2M79/81
108.192.0.0/104.2M79/81
108.64.0.0/112.1M79/81
12.80.0.0/121M80/81
12.112.0.0/121M80/81
12.240.0.0/121M80/81

Routing health

How AS7018's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid55.0%354
  • Invalid0.2%1
  • No ROA44.9%289

Propagation

  • Globally propagated90% of full-feed peers or more99.2%639
  • Partially propagated40% to 90%0.5%3
  • Seen by few peersUnder 40%0.3%2

Prefix sizes

IPv4 — 629 prefixes

IPv6 — 15 prefixes

  • /241.1T × /6413.3%2
  • /2868.7B × /646.7%1
  • /2934.4B × /646.7%1
  • /324.3B × /646.7%1
  • /4865.5k × /6466.7%10

Recent changes

Announcements that started or stopped since 27th Aug 2026.

36 announced and 7 withdrawn in all; the most recent are shown.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.