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AS13979AT&T Enterprises, LLC

United StatesRegistryARIN

As of 29th September 2026, AS13979 (AT&T Enterprises, LLC), a network registered in the United States with ARIN, originates 2 IPv4 prefixes covering 512 addresses. By IPv4 address space that makes it the 48,613th-largest of the 79,607 networks we see originating IPv4, and the 10,383rd-largest of 18,442 in the United States. It is seen behind 4 upstream networks, most often AS4473 (AT&T Enterprises, LLC) and AS4185 (AT&T Enterprises, LLC), and in front of 5 downstream networks. None of its announcements have a valid RPKI ROA. 0% of its routes reach at least 90% of full-feed peers, and 2 prefixes are also originated by another network.

At a glance

IPv4 prefixes

2

IPv6 prefixes

0

IPv4 addresses

512

IPv6 /64s

0

Upstream graph

The networks AS13979 is seen behind, one and two hops out, drawn from real AS paths.

AS13979Toward the internet core
Upstream graph for AS13979: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS13979AT&T Enterprises,…This networkAS3423AT&T Enterprises,…AS4185AT&T Enterprises,…AS4473AT&T Enterprises,…AS30016North American Te…AS7018AT&T Enterprises,…AS174Cogent Communicat…

Networks observed one and two hops upstream of AS13979 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

20

adjacent networks

Upstreams
420%
Peers
1155%
Downstreams
525%

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

Upstreams of AS13979
NetworkCountryRelationshipPathsVantage pts
AS4473AT&T Enterprises, LLCUSPeer4,728147
AS4185AT&T Enterprises, LLCUSPeer606147
AS3423AT&T Enterprises, LLCUSPeer557147
AS30016North American Telecommunications CorporationUSPeer3417

Prefixes

The largest blocks AS13979 originates, widest first.

Largest prefixes originated by AS13979
PrefixAddressesVisibility
204.10.158.0/2425617/82
204.10.159.0/2425617/82

Routing health

How AS13979'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

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%2

Propagation

  • Globally propagated90% of full-feed peers or more0.0%0
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%100.0%2

Prefix sizes

IPv4 — 2 prefixes

Recent changes

Announcements that started or stopped since 30th Aug 2026.

  • Withdrawn15.12.64.0/1821st Sept 2026

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