SUBNET.IM

AS21973Xponet

United StatesRegistryARIN

At a glance

IPv4 prefixes

15

IPv6 prefixes

4

IPv4 addresses

3.8k

IPv6 /64s

262k

Upstream graph

The networks AS21973 is seen behind, one and two hops out, drawn from real AS paths.

AS21973Toward the internet core
Upstream graph for AS21973: 9 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS21973XponetThis networkAS701Verizon BusinessAS3356Lumen (Level 3)AS7018AT&T Enterprises,…AS33132Zayo BandwidthAS46887Zayo BandwidthAS1299Arelion (fka. Tel…AS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS6461Zayo Bandwidth

Networks observed one and two hops upstream of AS21973 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

15

adjacent networks

Upstreams
747%
Peers
853%
Downstreams
00%

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

Upstreams of AS21973
NetworkCountryRelationshipPathsVantage pts
AS33132Zayo BandwidthUSPeer1,106142
AS701Verizon BusinessUSPeer124118
AS3356Lumen (Level 3)USPeer11157
AS7018AT&T Enterprises, LLCUSPeer7170
AS46887Zayo BandwidthUSPeer2626
AS11749MPInetUSPeer41
AS1000LINK AMERICANUSPeer11

Prefixes

The largest blocks AS21973 originates, widest first.

Largest prefixes originated by AS21973
PrefixAddressesVisibility
63.85.4.0/2425680/80
63.85.5.0/2425680/80
63.85.6.0/2425680/80
63.85.7.0/2425680/80
63.85.164.0/2425679/80
63.85.166.0/2425680/80
63.85.168.0/2425680/80
63.86.203.0/2425680/80
63.97.222.0/2425679/80
63.102.107.0/2425679/80

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