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AS201838Community Fibre Limited

United KingdomRegistryRIPE NCCTypeEyeball

As of 12th November 2026, AS201838 (Community Fibre Limited), an access network registered in the United Kingdom with RIPE NCC, originates 102 IPv4 prefixes covering 238k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 1,187th-largest of the 80,775 networks we see originating IPv4, and the 30th-largest of 2,121 in the United Kingdom. It is seen behind 32 upstream networks, most often AS2914 (NTT America, Inc.) and AS3356 (Lumen (Level 3)), and in front of 1 downstream network. 96% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. Over 99% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

102

IPv6 prefixes

2

IPv4 addresses

238k

IPv6 /64s

73B

Upstream graph

The networks AS201838 is seen behind, one and two hops out, drawn from real AS paths.

AS201838Toward the internet core
Upstream graph for AS201838: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS201838Community Fibre L…This networkAS2914NTT America, Inc.AS3356Lumen (Level 3)AS6939Hurricane Electri…AS18106Viewqwest Pte LtdAS25091IP-Max SAAS49544i3D.net B.VAS3549Lumen (fka. Globa…AS215859Hetzner Cloud - S…AS20130Depaul UniversityAS132337AxclusiveAS8298IPng Networks GmbHAS56662Marcin Gondek

Networks observed one and two hops upstream of AS201838 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

149

adjacent networks

Upstreams
3221%
Peers
11678%
Downstreams
11%

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

Upstreams of AS201838
NetworkCountryRelationshipPathsVantage pts
AS2914NTT America, Inc.USPeer3,493101
AS3356Lumen (Level 3)USPeer1,87935
AS6939Hurricane Electric LLCUSPeer32911
AS25091IP-Max SACHPeer2102
AS18106Viewqwest Pte LtdSGPeer2102
AS32590Valve CorporationUSPeer1082
AS58511Swoop (Anycast Global Backbone)AUPeer1082
AS52075Wifirst S.A.S.FRPeer1082
AS49544i3D.net B.VNLPeer1082
AS999CORIX NETWORKSUSPeer1082

Prefixes

All 104

The largest blocks AS201838 originates, widest first.

Largest prefixes originated by AS201838
PrefixAddressesVisibility
147.12.128.0/1732.8k78/78
149.22.128.0/1732.8k78/78
149.34.128.0/1816.4k78/78
149.86.0.0/1816.4k1/78
212.132.192.0/1816.4k78/78
161.51.192.0/198.2k78/78
168.199.64.0/198.2k78/78
89.36.112.0/204.1k78/78
89.45.176.0/204.1k78/78
89.222.16.0/204.1k78/78

Routing health

How AS201838'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

  • Valid96.2%100
  • Invalid0.0%0
  • No ROA3.8%4

Propagation

  • Globally propagated90% of full-feed peers or more99.0%103
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%1.0%1

Prefix sizes

IPv4 — 102 prefixes

IPv6 — 2 prefixes

  • /2868.7B × /6450.0%1
  • /324.3B × /6450.0%1

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.