SUBNET.IM

AS21The RAND Corporation

United StatesRegistryARIN

At a glance

IPv4 prefixes

10

IPv6 prefixes

0

IPv4 addresses

2.6k

IPv6 /64s

0

Upstream graph

The networks AS21 is seen behind, one and two hops out, drawn from real AS paths.

AS21Toward the internet core
Upstream graph for AS21: 10 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS21The RAND Corporat…This networkAS5650Verizon (fka. Fro…AS7016Comcast Cable Com…AS7046Verizon BusinessAS46887Zayo BandwidthAS174Cogent Communicat…AS7922Comcast Cable Com…AS3356Lumen (Level 3)AS701Verizon BusinessAS1321Verizon BusinessAS6461Zayo Bandwidth

Networks observed one and two hops upstream of AS21 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

8

adjacent networks

Upstreams
450%
Peers
450%
Downstreams
00%

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

Upstreams of AS21
NetworkCountryRelationshipPathsVantage pts
AS46887Zayo BandwidthUSPeer69479
AS7046Verizon BusinessUSPeer7979
AS7016Comcast Cable Communications, LLCUSPeer164
AS5650Verizon (fka. Frontier)USPeer102

Prefixes

The largest blocks AS21 originates, widest first.

Largest prefixes originated by AS21
PrefixAddressesVisibility
130.154.0.0/2425680/80
130.154.1.0/2425680/80
130.154.3.0/2425680/80
130.154.11.0/2425680/80
130.154.30.0/2425680/80
130.154.33.0/2425680/80
130.154.111.0/2425680/80
130.154.113.0/2425680/80
166.67.240.0/2425679/80
192.5.14.0/2425680/80

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