SUBNET.IM

AS104University of Colorado at Boulder

United StatesRegistryARIN

At a glance

IPv4 prefixes

20

IPv6 prefixes

1

IPv4 addresses

91.1k

IPv6 /64s

4.3B

Upstream graph

The networks AS104 is seen behind, one and two hops out, drawn from real AS paths.

AS104Toward the internet core
Upstream graph for AS104: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS104University of Col…This networkAS3356Lumen (Level 3)AS14041University Corpor…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS1299Arelion (fka. Tel…

Networks observed one and two hops upstream of AS104 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
250%
Peers
250%
Downstreams
00%

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

Upstreams of AS104
NetworkCountryRelationshipPathsVantage pts
AS14041University Corporation for Atmospheric ResearchUSPeer84950
AS3356Lumen (Level 3)USPeer811130

Prefixes

The largest blocks AS104 originates, widest first.

Largest prefixes originated by AS104
PrefixAddressesVisibility
128.138.0.0/1665.5k80/80
129.19.192.0/1816.4k80/80
198.11.16.0/204.1k80/80
146.5.20.0/221k80/80
192.12.238.0/2425680/80
192.12.240.0/2425680/80
192.12.241.0/2425680/80
192.12.242.0/2425680/80
192.12.244.0/2425680/80
192.12.245.0/2425680/80

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