SUBNET.IM

AS54187EZE Castle Integration Inc.

United StatesRegistryARIN

At a glance

IPv4 prefixes

4

IPv6 prefixes

1

IPv4 addresses

1.5k

IPv6 /64s

4.3B

Upstream graph

The networks AS54187 is seen behind, one and two hops out, drawn from real AS paths.

AS54187Toward the internet core
Upstream graph for AS54187: 9 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS54187EZE Castle Integr…This networkAS3491PCCW Global (HK) …AS4637Telstra Internati…AS8220COLTAS24516Virtutel Pty LtdAS58511Swoop (Anycast Gl…AS16552Tiggee LLCAS32590Valve CorporationAS1299Arelion (fka. Tel…AS15576NTS workspace AG

Networks observed one and two hops upstream of AS54187 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

6

adjacent networks

Upstreams
350%
Peers
350%
Downstreams
00%

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

Upstreams of AS54187
NetworkCountryRelationshipPathsVantage pts
AS8220COLTGBPeer15075
AS4637Telstra International LimitedHKPeer14297
AS3491PCCW Global (HK) Ltd.HKPeer8844

Prefixes

The largest blocks AS54187 originates, widest first.

Largest prefixes originated by AS54187
PrefixAddressesVisibility
103.21.28.0/2351279/80
103.21.30.0/2351280/80
103.21.28.0/2425679/80
103.21.30.0/2425680/80
2405:5500::/324.3B × /6462/62

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