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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.
3,123 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications PLC | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 168 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 340 |
| AS212238GB | CDNEXT Datacamp Limited | 1M | 4,120 |
| 2K |
| — |
| 2 |
| AS200700GB | BMC_UK-1 BMC TV LTD | 2K | — | 5 |
| AS21188GB | UNILEVER-ES-UK Unilever PLC | 2K | — | 4 |
| AS8444GB | HENDERSON JANUS HENDERSON ADMINISTRATION UK LIMITED | 2K | — | 8 |
| AS44442GB | TelfordWrekinCouncilAS The Borough of Telford and Wrekin Council | 2K | — | 1 |
| AS207087GB | pay360 Pay360 Ltd | 2K | — | 5 |
| AS47685GB | ASN-BOGONS-HEAVY-NORTH Bogons Heavy Industries (North) Ltd | 2K | — | 1 |
| AS34737GB | QinetiQ-ISP Qinetiq Limited | 2K | — | 4 |
| AS35259GB | APM APM Internet Ltd | 2K | — | 1 |
| AS204436GB | KUALO-AS Kualo Limited | 2K | 65.5K | 3 |
| AS34499GB | BlackBox-LINX BlackBox Hosting Ltd | 2K | — | 5 |
| AS209611GB | HFLBROADBAND HFLBroadband Ltd | 2K | — | 3 |
| AS28729GB | FORD-AS Ford Motor Company Limited | 2K | 1 | 2 |
| AS203416GB | it-comms-AS I.T Communications Limited | 2K | 524.3K | 5 |
| AS211389GB | briantbroadband Briant Broadband Limited | 2K | 524.3K | 7 |
| AS210970GB | mosento mosento LTD | 2K | — | 8 |
| AS59933GB | SENSICAL Sensical Services Limited | 2K | 65.5K | 4 |
| AS34350GB | MANGROUP Man Investments Limited | 2K | — | 5 |
| AS60925GB | BPP-ASN BPP Services Limited | 2K | — | 1 |
| AS203372GB | GSACAPITAL-EU-AS GSA Capital Services Ltd | 2K | — | 3 |
| AS202466GB | qbeeo QBE Management Services (UK) Limited | 2K | — | 5 |
| AS58305GB | SYN-US SYN LTD | 2K | 13 | 21 |
| AS56460GB | O2-WIFI-AS Telefonica UK Limited | 2K | — | 2 |
| AS202312GB | SMBCNIKKOCM SMBC Bank International plc | 2K | 65.5K | 7 |
| AS49694GB | UK-FR-MNLTD Masternaut Limited | 2K | 3 | 11 |
| AS34746GB | AXA_INSURANCE AXA Insurance UK plc | 2K | — | 1 |
| AS41400GB | GNOL-AS R.M. Wotton T/A G-Net Online | 2K | 524.3K | 3 |
| AS205693GB | dvla Driver & Vehicle Licensing Agency | 2K | — | 4 |
| AS49247GB | ESFRS East Sussex Fire Authority | 2K | — | 1 |
| AS207039GB | SAC-AS Satellite Applications Catapult Limited | 2K | — | 3 |
| AS43534GB | CREDITCALL Network Merchants Limited | 2K | — | 5 |
| AS203185GB | PebbleTree PEBBLETREE LTD | 1.8K | 3 | 10 |
| AS42237GB | w1n w1n ltd | 1.8K | 655.4K | 17 |
| AS198386GB | ONI THRIVE OPERATIONS LIMITED | 1.8K | — | 4 |
| AS214467GB | digided-as DIGIDED LTD | 1.8K | — | 7 |
| AS41099GB | globalreach Global Reach Networks Limited | 1.8K | — | 7 |
| AS202454GB | PINE-MEDIA Pine Media Ltd | 1.8K | — | 7 |
| AS208507GB | MitsubishiHC-Capital Mitsubishi HC Capital UK PLC | 1.8K | — | 5 |
| AS215429GB | Ireland IQVIA SOLUTIONS HQ LTD | 1.8K | — | 3 |
| AS212633GB | EE-Mobile EE Mobile Telecom Ltd | 1.8K | 524.3K | 8 |
| AS49418GB | AS-NETSHIELD NETSHIELD LTD | 1.8K | 67 | 11 |
| AS60841GB | BERRYBYTE berrybyte Limited | 1.8K | 258 | 10 |
| AS201715GB | ineedbr Ineedbroadband Ltd | 1.8K | — | 4 |
| AS198990GB | PINEHOST-NET Pine Hosting LTD | 1.8K | — | 4 |
| AS41246GB | EMS-AS Electronic Media Services Ltd | 1.8K | — | 4 |
| AS197246GB | BELGRAVIA-AS BELGRAVIA MEDIA LTD | 1.8K | — | 7 |
| AS48447GB | Sectigo Sectigo Limited | 1.8K | 65.5K | 5 |