SUBNET.IM

AS2501The University of Tokyo

JapanRegistryAPNIC

At a glance

IPv4 prefixes

4

IPv6 prefixes

2

IPv4 addresses

201k

IPv6 /64s

4.3B

Upstream graph

The networks AS2501 is seen behind, one and two hops out, drawn from real AS paths.

AS2501Toward the internet core
Upstream graph for AS2501: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS2501The University of…This networkAS2500WIDE ProjectAS2907Science Informati…AS2914NTT America, Inc.AS17676SoftBank Corp.AS2497Internet Initiati…AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS2501 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 AS2501
NetworkCountryRelationshipPathsVantage pts
AS2907Science Information NetworkJPPeer410133
AS2500WIDE ProjectJPPeer287

Prefixes

The largest blocks AS2501 originates, widest first.

Largest prefixes originated by AS2501
PrefixAddressesVisibility
130.69.0.0/1665.5k79/80
133.11.0.0/1665.5k79/80
157.82.0.0/1665.5k79/80
192.51.208.0/204.1k79/80
2404:d540::/324.3B × /6461/62
2404:d540:1::/4865.5k × /6461/62

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