SUBNET.IM

AS15404COLT Technology Services Group Limited

United KingdomRegistryRIPE NCC

At a glance

IPv4 prefixes

149

IPv6 prefixes

9

IPv4 addresses

147k

IPv6 /64s

4.6B

Upstream graph

The networks AS15404 is seen behind, one and two hops out, drawn from real AS paths.

AS15404Toward the internet core
Upstream graph for AS15404: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS15404COLT Technology S…This networkAS8220COLTAS1299Arelion (fka. Tel…AS15576NTS workspace AG

Networks observed one and two hops upstream of AS15404 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

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

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

Upstreams of AS15404
NetworkCountryRelationshipPathsVantage pts
AS8220COLTGBPeer12,319141

Prefixes

All 158

The largest blocks AS15404 originates, widest first.

Largest prefixes originated by AS15404
PrefixAddressesVisibility
161.17.0.0/1665.5k80/80
62.85.160.0/198.2k80/80
194.59.96.0/198.2k80/80
5.11.96.0/204.1k80/80
148.188.0.0/204.1k80/80
148.188.192.0/204.1k80/80
193.29.144.0/204.1k80/80
148.188.232.0/212k80/80
178.249.200.0/212k80/80
194.99.120.0/212k80/80

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