subnet.im

AS4185AT&T Enterprises, LLC

United StatesRegistryARIN

As of 28th September 2026, AS4185 (AT&T Enterprises, LLC), a network registered in the United States with ARIN, originates 12 IPv4 prefixes covering 134k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 1,849th-largest of the 79,568 networks we see originating IPv4, and the 556th-largest of 18,431 in the United States. It is seen behind 1 upstream network, most often AS7018 (AT&T Enterprises, LLC), and in front of 1 downstream network. 27% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

12

IPv6 prefixes

3

IPv4 addresses

134k

IPv6 /64s

1.2M

Upstream graph

The networks AS4185 is seen behind, one and two hops out, drawn from real AS paths.

AS4185Toward the internet core
Upstream graph for AS4185: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS4185AT&T Enterprises,…This networkAS7018AT&T Enterprises,…AS2914NTT America, Inc.AS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS4185 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

adjacent networks

Upstreams
125%
Peers
250%
Downstreams
125%

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

Upstreams of AS4185
NetworkCountryRelationshipPathsVantage pts
AS7018AT&T Enterprises, LLCUSPeer1,785147

Prefixes

The largest blocks AS4185 originates, widest first.

Largest prefixes originated by AS4185
PrefixAddressesVisibility
152.75.0.0/1665.5k82/82
165.110.0.0/1665.5k82/82
12.14.12.0/2425682/82
12.14.14.0/2425682/82
12.150.176.0/2425682/82
12.150.186.0/2425682/82
12.183.71.0/2425682/82
12.185.4.0/2425682/82
12.185.7.0/2425682/82
152.75.221.0/2425682/82

Routing health

How AS4185'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

  • Valid26.7%4
  • Invalid0.0%0
  • No ROA73.3%11

Propagation

  • Globally propagated90% of full-feed peers or more100.0%15
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 12 prefixes

IPv6 — 3 prefixes

  • /441M × /6433.3%1
  • /4865.5k × /6466.7%2

Recent changes

Announcements that started or stopped since 29th Aug 2026.

  • Withdrawn148.184.0.0/1621st Sept 2026
  • Withdrawn2620:0:900::/4821st Sept 2026

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