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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 | 4,290 |
| 256 |
| 1 |
| 2 |
| AS206800GB | EA-SE-STOCKHOLM Electronic Arts Limited | 256 | — | 1 |
| AS8272GB | NETSCALIBUR-UK Claranet Limited | 256 | — | 1 |
| AS203961GB | CentralNic-Anycast-G CentralNic Ltd | 256 | 1 | 2 |
| AS215833GB | AblativeConsulting Ablative Consulting Ltd | 256 | 1 | 2 |
| AS204776GB | Mintopia Jessica Smith | 256 | 257 | 3 |
| AS35241GB | vostel Vostel Limited | 256 | — | 1 |
| AS196990GB | COMFIRST-AS Shawbrook Bank Limited | 256 | — | 1 |
| AS48632GB | BTS-HOLDINGS-PLC BTS HOLDINGS PLC | 256 | — | 1 |
| AS207601GB | EA-FR-LYON Electronic Arts Limited | 256 | — | 1 |
| AS212880GB | AS-LLTN-RIPE Rydal Communications Ltd | 256 | — | 1 |
| AS218950GB | VYTAL VYTAL TECHNOLOGY LTD | 256 | — | 1 |
| AS48003GB | MORRISONS-AS Wm Morrison Supermarkets Limited | 256 | — | 1 |
| AS213016GB | holker-network-solutions Holker Network Solutions Ltd | 256 | — | 1 |
| AS34611GB | Mystere Matthew Southgate | 256 | — | 1 |
| AS206981GB | TeritumDevelopment Christopher Mountford | 256 | 1 | 2 |
| AS205772GB | LARMITGTOP-AS LARMITGTOP LTD | 256 | — | 1 |
| AS202529GB | CDW-UK-IT-ASN CDW Ltd | 256 | — | 1 |
| AS30894GB | SINCH-MBLOX-AS SINCH UK LTD. | 256 | — | 1 |
| AS56438GB | LOOPSCORPIO-AS Loop Scorpio Ltd | 256 | — | 1 |
| AS207194GB | TOTALCOMPUTERS Total Computer Services Ltd | 256 | — | 1 |
| AS201353GB | CuTEL Matthew Harrold | 256 | 1 | 2 |
| AS211437GB | SurlyNet Gareth Woolridge | 256 | 16 | 2 |
| AS202939GB | CHIMON-NETWORK Chimon Technology Ltd | 256 | 849 | 22 |
| AS50985GB | EA-UK-RUN Electronic Arts Limited | 256 | — | 1 |
| AS213119GB | ALZ-SOFTWARE-AS ALZ Software Ltd | 256 | — | 1 |
| AS214947GB | KAWEB Kaweb Limited | 256 | 524.3K | 2 |
| AS59783GB | SBIX-DUS ONESAVINGS BANK PLC | 256 | — | 1 |
| AS212729GB | ERL Everlight Radiology Limited | 256 | — | 1 |
| AS3252GB | FBRX-AS Fiberax Networking&Cloud Ltd | 256 | — | 1 |
| AS208907GB | RISING-BRIDGE-TECHNOLOGY Rising Bridge Technology Ltd | 256 | 1 | 2 |
| AS201323GB | host-media-ltd Host Media Ltd | 256 | 65.5K | 2 |
| AS197284GB | K3X-MNT K3X SYSTEMS Ltd | 256 | 1 | 2 |
| AS59756GB | ENQUEST-AS Enquest Britain Limited | 256 | — | 1 |
| AS205012GB | giant Giant Communications Ltd | 256 | 524.3K | 2 |
| AS34693GB | CME-AS-LD4-1 CME Operations Limited | 256 | — | 1 |
| AS214420GB | CLNEXUS Conor Lewis | 256 | 78.6K | 14 |
| AS208902GB | ValeroUK Valero Energy Ltd | 256 | — | 1 |
| AS207536GB | SEABECKSOLUTIONS-AS SEABECK SOLUTIONS LIMITED | 256 | — | 1 |
| AS213885GB | WXTANGO-MNT Wilxite Ltd | 256 | — | 1 |
| AS58007GB | Witine Witine Limited | 256 | 1 | 2 |
| AS209503GB | Zentyx Zentyx Limited | 256 | 1 | 2 |
| AS219094GB | MCDADE William McDade | 256 | 2 | 3 |
| AS219236GB | WGL Wolf Girls Limited | 256 | 1 | 2 |
| AS202587GB | UMOJA-AS C2C Ltd | 256 | — | 1 |
| AS214323GB | MSH-UK Marcus Hughes | 256 | 2 | 3 |
| AS199828GB | Inet-Plc-AS NUSO CLOUD UK LIMITED | 256 | — | 1 |