SUBNET.IM

AS18731Cityside Fiber

United StatesRegistryARIN

At a glance

IPv4 prefixes

3

IPv6 prefixes

1

IPv4 addresses

768

IPv6 /64s

4.3B

Upstream graph

The networks AS18731 is seen behind, one and two hops out, drawn from real AS paths.

AS18731Toward the internet core
Upstream graph for AS18731: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS18731Cityside FiberThis networkAS174Cogent Communicat…AS1000LINK AMERICANAS3356Lumen (Level 3)AS6461Zayo BandwidthAS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS6453TATA Communicatio…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS6667Elisa OyjAS32590Valve Corporation

Networks observed one and two hops upstream of AS18731 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

10

adjacent networks

Upstreams
440%
Peers
660%
Downstreams
00%

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

Upstreams of AS18731
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer136136
AS6461Zayo BandwidthUSPeer8080
AS3356Lumen (Level 3)USPeer7878
AS1000LINK AMERICANUSPeer11

Prefixes

The largest blocks AS18731 originates, widest first.

Largest prefixes originated by AS18731
PrefixAddressesVisibility
23.164.40.0/2425679/80
128.177.138.0/2425680/80
154.50.58.0/2425679/80
2607:73c0::/324.3B × /6457/62

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