Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS205311

Announcement observedRIPE NCC

Cambridge Fibre Networks Ltd. · Cambridge_Fibre_Networks

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active10/10/2026, 23:58:05Snapshot expired

View network topology RDAP registration

ASN: AS205311
Registration country: United Kingdom
Name: Cambridge Fibre Networks Ltd.
Abbreviation: Cambridge_Fibre_Networks
Registration date: 9/25/2017, 14:45:30
Status: Announcement observed
RIR: RIPE NCC

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
185.219.108.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/26/2026, 16:00:00	10/10/2026, 16:00:00	✓	×	Currently valid
185.229.51.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/26/2026, 16:00:00	10/10/2026, 16:00:00	✓	×	Currently valid

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: Cambridge Fibre Networks Ltd.
RIR: RIPE NCC
Registration country: United Kingdom
Registration date: 9/25/2017, 14:45:30
Abuse contact: abuse@cfn.ltd

Snapshot trend

10/10/2026, 23:58:052 v41 v61 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · iana-rdap-asn-bootstrap · rir-rdap-asn