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AS213451Cilix Limited

United KingdomRegistryRIPE NCCTypeEyeball

As of 27th September 2026, AS213451 (Cilix Limited), an access network registered in the United Kingdom with RIPE NCC, originates 4 IPv4 prefixes covering 1k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 35,811th-largest of the 79,525 networks we see originating IPv4, and the 1,035th-largest of 2,074 in the United Kingdom. It is seen behind 1 upstream network, most often AS215638 (Cilix Limited). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

4

IPv6 prefixes

1

IPv4 addresses

1k

IPv6 /64s

4.3B

Upstream graph

The networks AS213451 is seen behind, one and two hops out, drawn from real AS paths.

AS213451Toward the internet core
Upstream graph for AS213451: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS213451Cilix LimitedThis networkAS215638Cilix LimitedAS1299Arelion (fka. Tel…AS9002RETN Limited

Networks observed one and two hops upstream of AS213451 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 AS213451
NetworkCountryRelationshipPathsVantage pts
AS215638Cilix LimitedGBPeer383143

Prefixes

The largest blocks AS213451 originates, widest first.

Largest prefixes originated by AS213451
PrefixAddressesVisibility
51.241.58.0/2425680/81
51.241.59.0/2425680/81
78.105.211.0/2425680/81
82.39.98.0/2425680/81
2a14:f701::/324.3B × /6463/64

Routing health

How AS213451'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

  • Valid100.0%5
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%5
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 4 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS213451 started or stopped in this period.

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