Cambridge Fibre Networks Ltd.
AS205311 is Cambridge Fibre Networks Ltd. (cfn.ltd). It announces 1,280 IPv4 addresses in 2 prefixes, and 1 IPv6 prefixes.
United Kingdom· RIPE· allocated 2017-09-25· isp
Where its space is
The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.
- United Kingdom1,280 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- Cambridge_Fibre_Networks
- name
- Cambridge Fibre Networks Ltd.
- org
- ORG-CFNL1-RIPE
- org name
- Cambridge Fibre Networks Ltd.
- org address
- 21 Signet Court, CB5 8LA, Cambridge, UNITED KINGDOM
- org country
- GB
- country
- GB
- source
- ripe
- status
- ASSIGNED
- created
- 2017-09-25
- updated
- 2019-07-03
- maintainer
- RIPE-NCC-END-MNT|uk-cfn-1-mnt
- abuse name
- Abuse-C Role
- abuse email
- abuse@cfn.ltd
- abuse kind
- role
What the databases see
Addresses each address-keyed database holds in the IPv4 it announces, as a share of that space, with its largest providers. Counts overlap.
- VPN IP43draytek3.36%
- anyip, proxyseller, dataimpulse1.80%
- None here
- None here
- None here
- None here
- Hosting IP1,024netservers80.00%
- None here
- None here
- None here
- SSH IP251.95%
- 0.39%
- 0.08%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 185.219.108.0/22 | United Kingdom | valid | 17 | 2026-10-02 |
| 185.229.51.0/24 | United Kingdom | valid | 17 | 2026-10-02 |
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 2a0b:e540::/29 | United Kingdom | valid | 20 | 2026-10-02 |
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