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How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.
PeeringDB-registered presence.
APNIC-measured end-user deployment.
Clean prefixes (valid RPKI + IRR, no mismatch).
Cumulative IPv4, IPv6, and ASN allocations to United Kingdom over time.
The largest autonomous systems registered to United Kingdom by IPv4 footprint.
United Kingdom against its land-border neighbours on IPv4, IPv6, AS numbers and per-capita density.
Share of announced address space covered by valid Route Origin Authorizations.
3,134 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 368 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,229 |
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| 0 |
| AS8835GB | VITRIFI Vitrifi Limited | — | — | 0 |
| AS43835GB | NCC NCC Services Ltd | — | — | 0 |
| AS206877GB | SharedGrid SharedGrid Ltd | — | 1 | 1 |
| AS198722GB | TXRX-AS 1310 Limited | — | — | 0 |
| AS49374GB | BFD-IX Konstantin Verba | — | — | 0 |
| AS59426GB | ISP-INTEXON-LTD INTEXON LTD | — | — | 0 |
| AS214749GB | PAW James Cahill | — | 7 | 7 |
| AS199228GB | IHOR-AS IHOR HOSTING LTD | — | — | 0 |
| AS202107GB | UK-CABINETOFFICE-AS Cabinet Office | — | — | 0 |
| AS200104GB | crow PETALDATA LTD | — | 1 | 1 |
| AS214705GB | Jamf JAMF LTD | — | — | 0 |
| AS62189GB | INNETRA-EU Elna Paulette Valentin trading as INNETRA PC | — | — | 0 |
| AS21493GB | PKXGEU GTT - EMEA Ltd. | — | — | 0 |
| AS219189GB | CLNEXUS CLNexus LTD | — | — | 0 |
| AS43157GB | URBANWIMAX-NET Telcom Networks Limited | — | — | 0 |
| AS48663GB | PORTFAST-NORTH Portfast Ltd | — | — | 0 |
| AS57114GB | DEDISHACK Dedishack Ltd | — | — | 0 |
| AS59839GB | BROMLEYNET Bromleynet Limited | — | — | 0 |
| AS214409GB | ZEKTRA-AS Robotic Node LTD | — | — | 0 |
| AS44110GB | WALSALL Walsall Metropolitan Borough Council | — | — | 0 |
| AS211035GB | PHANTOM-HIVE-AS PHANTOM HIVE NETWORK LTD | — | 2 | 2 |
| AS218703GB | Tempest TEMPEST OPERATIONS UK LTD | — | — | 0 |
| AS219022GB | FREEVPN FREE VPN GLOBAL LTD | — | — | 0 |
| AS6749GB | DEMON-INTERNET Vodafone Limited | — | — | 0 |
| AS8844GB | COMMUNITY GTT - EMEA Ltd. | — | — | 0 |
| AS16755GB | The-London-Metal-Exchange The London Metal Exchange | — | — | 0 |
| AS199349GB | SphereDent-AS SphereDent LTD | — | — | 0 |
| AS15421GB | INAP-PAR PACKETFABRIC (UK) LTD | — | — | 0 |
| AS59529GB | CME-AS-LO2-1 CME Operations Limited | — | — | 0 |
| AS61977GB | PATH-GLOBAL-UK-LIMITED Path Global UK Limited | — | — | 0 |