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AS8468Cityfibre Limited

United KingdomRegistryRIPE NCCTypeEyeball

As of 10th November 2026, AS8468 (Cityfibre Limited), an access network registered in the United Kingdom with RIPE NCC, originates 46 IPv4 prefixes covering 365k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 869th-largest of the 80,723 networks we see originating IPv4, and the 23rd-largest of 2,122 in the United Kingdom. It is seen behind 33 upstream networks, most often AS3356 (Lumen (Level 3)) and AS1299 (Arelion (fka. Telia Carrier)), and in front of 4 downstream networks. 65% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 96% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

46

IPv6 prefixes

3

IPv4 addresses

365k

IPv6 /64s

73B

Upstream graph

The networks AS8468 is seen behind, one and two hops out, drawn from real AS paths.

AS8468Toward the internet core
Upstream graph for AS8468: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS8468Cityfibre LimitedThis networkAS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS6667Elisa OyjAS6939Hurricane Electri…AS13030Init7 (Switzerlan…AS16552Tiggee LLCAS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS20130Depaul UniversityAS132337AxclusiveAS56662Marcin Gondek

Networks observed one and two hops upstream of AS8468 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

165

adjacent networks

Upstreams
3320%
Peers
12878%
Downstreams
42%

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

Upstreams of AS8468
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer1,24854
AS1299Arelion (fka. Telia Carrier)SEPeer1,14277
AS6939Hurricane Electric LLCUSPeer15316
AS13030Init7 (Switzerland) Ltd.CHPeer1144
AS6667Elisa OyjFIPeer1144
AS25091IP-Max SACHPeer1145
AS14537Continent 8 LLCUSPeer1144
AS18106Viewqwest Pte LtdSGPeer1084
AS24482SG.GSSGPeer604
AS3170VeloxServ Communications LtdGBPeer592

Prefixes

All 49

The largest blocks AS8468 originates, widest first.

Largest prefixes originated by AS8468
PrefixAddressesVisibility
78.32.0.0/15131k76/76
87.127.0.0/1665.5k76/76
188.39.0.0/1665.5k76/76
84.45.128.0/1732.8k76/76
62.249.192.0/1816.4k76/76
81.31.96.0/198.2k76/76
109.224.160.0/198.2k76/76
195.74.96.0/198.2k76/76
79.143.144.0/204.1k76/76
156.67.240.0/204.1k21/76

Routing health

How AS8468'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

  • Valid65.3%32
  • Invalid0.0%0
  • No ROA34.7%17

Propagation

  • Globally propagated90% of full-feed peers or more95.9%47
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%4.1%2

Prefix sizes

IPv4 — 46 prefixes

IPv6 — 3 prefixes

  • /2934.4B × /6466.7%2
  • /324.3B × /6433.3%1

Recent changes

Announcements that started or stopped since 11th Oct 2026.

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