SUBNET.IM

AS39961San Francisco Department of Telecommunications and Information Services

United StatesRegistryARIN

At a glance

IPv4 prefixes

12

IPv6 prefixes

0

IPv4 addresses

59.6k

IPv6 /64s

0

Upstream graph

The networks AS39961 is seen behind, one and two hops out, drawn from real AS paths.

AS39961Toward the internet core
Upstream graph for AS39961: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS39961San Francisco Dep…This networkAS7018AT&T Enterprises,…AS11404Wave BroadbandAS2914NTT America, Inc.AS1299Arelion (fka. Tel…AS3257GTT Communication…

Networks observed one and two hops upstream of AS39961 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

5

adjacent networks

Upstreams
240%
Peers
360%
Downstreams
00%

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

Upstreams of AS39961
NetworkCountryRelationshipPathsVantage pts
AS11404Wave BroadbandUSPeer56080
AS7018AT&T Enterprises, LLCUSAdjacent40080

Prefixes

The largest blocks AS39961 originates, widest first.

Largest prefixes originated by AS39961
PrefixAddressesVisibility
208.121.128.0/1732.8k80/80
208.121.64.0/1816.4k80/80
208.121.32.0/204.1k80/80
208.121.48.0/204.1k80/80
208.121.226.0/2351280/80
208.121.0.0/2425680/80
208.121.1.0/2425680/80
208.121.5.0/2425680/80
208.121.6.0/2425680/80
208.121.203.0/2425680/80

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