SUBNET.IM

AS7521INTERNET MULTIFEED CO.

JapanRegistryAPNIC

At a glance

IPv4 prefixes

8

IPv6 prefixes

1

IPv4 addresses

4.9k

IPv6 /64s

4.3B

Upstream graph

The networks AS7521 is seen behind, one and two hops out, drawn from real AS paths.

AS7521Toward the internet core
Upstream graph for AS7521: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS7521INTERNET MULTIFEE…This networkAS55391INTERNET MULTIFEE…AS2497Internet Initiati…AS2914NTT America, Inc.

Networks observed one and two hops upstream of AS7521 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

14

adjacent networks

Upstreams
17%
Peers
750%
Downstreams
643%

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

Upstreams of AS7521
NetworkCountryRelationshipPathsVantage pts
AS55391INTERNET MULTIFEED CO.JPPeer2,540141

Prefixes

The largest blocks AS7521 originates, widest first.

Largest prefixes originated by AS7521
PrefixAddressesVisibility
210.173.160.0/212k79/80
210.173.180.0/221k79/80
210.173.186.0/2351279/80
115.69.237.0/2425675/80
210.173.168.0/2425679/80
210.173.170.0/2425679/80
210.173.172.0/2425679/80
210.173.178.0/2425678/80
2001:3a0::/324.3B × /6462/62

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