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AS12390KCOM Group Limited

United KingdomRegistryRIPE NCCTypeEyeball

As of 12th November 2026, AS12390 (KCOM Group Limited), an access network registered in the United Kingdom with RIPE NCC, originates 18 IPv4 prefixes covering 260k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 1,129th-largest of the 80,772 networks we see originating IPv4, and the 28th-largest of 2,122 in the United Kingdom. It is seen behind 36 upstream networks, most often AS174 (Cogent Communications, LLC) and AS3356 (Lumen (Level 3)), and in front of 1 downstream network. 95% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 95% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

18

IPv6 prefixes

2

IPv4 addresses

260k

IPv6 /64s

8.6B

Upstream graph

The networks AS12390 is seen behind, one and two hops out, drawn from real AS paths.

AS12390Toward the internet core
Upstream graph for AS12390: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS12390KCOM Group LimitedThis networkAS174Cogent Communicat…AS3356Lumen (Level 3)AS6939Hurricane Electri…AS14537Continent 8 LLCAS25091IP-Max SAAS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS20130Depaul UniversityAS132337AxclusiveAS8298IPng Networks GmbH

Networks observed one and two hops upstream of AS12390 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

153

adjacent networks

Upstreams
3624%
Peers
11676%
Downstreams
11%

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

Upstreams of AS12390
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer61651
AS3356Lumen (Level 3)USPeer45242
AS6939Hurricane Electric LLCUSPeer8911
AS14537Continent 8 LLCUSPeer484
AS25091IP-Max SACHPeer484
AS18106Viewqwest Pte LtdSGPeer442
AS34549meerfarbig GmbH & Co. KGDEPeer263
AS3170VeloxServ Communications LtdGBPeer242
AS16552Tiggee LLCUSPeer242
AS39122Blacknight Internet Solutions LimitedIEPeer242

Prefixes

The largest blocks AS12390 originates, widest first.

Largest prefixes originated by AS12390
PrefixAddressesVisibility
5.198.0.0/1732.8k77/78
77.86.0.0/1732.8k77/78
83.100.128.0/1732.8k77/78
87.102.0.0/1732.8k77/78
94.72.192.0/1816.4k77/78
178.78.64.0/1816.4k77/78
213.249.128.0/1816.4k77/78
213.249.192.0/1816.4k77/78
194.207.64.0/198.2k77/78
194.207.96.0/198.2k77/78

Routing health

How AS12390's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid95.0%19
  • Invalid0.0%0
  • No ROA5.0%1

Propagation

  • Globally propagated90% of full-feed peers or more95.0%19
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%5.0%1

Prefix sizes

IPv4 — 18 prefixes

IPv6 — 2 prefixes

  • /324.3B × /64100.0%2

Recent changes

Announcements that started or stopped since 13th Oct 2026.

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