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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 | 170 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 976.9K | 4,012 |
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| AS200167GB | excellondon London International Exhibition Centre PLC | — | — | 0 |
| AS212474GB | Daniella-Smithson Daniella Smithson | — | — | 0 |
| AS203276GB | JAMINIT James Cook | — | — | 0 |
| AS215471GB | INTERNETTYUK-MDU Internetty Ltd | — | — | 0 |
| AS12852GB | EASYNETES-AS GTT - EMEA Ltd. | — | — | 0 |
| AS25314GB | CCUK1 Clear Connect Limited | — | — | 0 |
| AS212857GB | fibreway Fibreway Limited | — | — | 0 |
| AS211131GB | as_globaltechinterapps LOBOS NETWORKING LTD | — | — | 0 |
| AS208242GB | JM-HOME Jacob Mansfield | — | — | 0 |
| AS213308GB | CRISILUKIREVNA CRISIL Irevna UK Limited | — | — | 0 |
| AS214705GB | Jamf JAMF LTD | — | — | 0 |
| AS215963GB | torin Torin Storkey | — | — | 0 |
| AS5622GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS35269GB | vx-london VELOCIX SOLUTIONS LIMITED | — | — | 0 |
| AS43367GB | IWEB-HOSTING Interactive Web Solutions Ltd | — | — | 0 |
| AS49263GB | YourBroadband_UK 4on LTD | — | — | 0 |
| AS208784GB | ASTLRK TELROCK SYSTEMS LIMITED | — | — | 0 |
| AS50461GB | CITYTELECOM City Telecom LTD | — | — | 0 |
| AS199349GB | SphereDent-AS SphereDent LTD | — | — | 0 |
| AS211224GB | JB3 Joseph Banks | — | 17 | 2 |
| AS201422GB | MEDIEVALSNAIL-ASN Medieval Snail Limited | — | — | 0 |
| AS213112GB | IPMultihome IP Multihome Limited | — | — | 0 |
| AS203056GB | TTBNGVS TalkTalk Communications Limited | — | — | 0 |
| AS199794GB | EMO-AS EMOCLOUD LTD | — | 256 | 1 |
| AS204047GB | BT-PSN-DNSP-AS British Telecommunications PLC | — | — | 0 |
| AS212434GB | ITOGETHER Network Integration Technologies LTD | — | — | 0 |
| AS212180GB | ERL-HSCN Everlight Radiology Limited | — | — | 0 |
| AS197872GB | EA-NL-AMSTERDAM_DC Electronic Arts Limited | — | — | 0 |
| AS57932GB | IXLEEDS-ROUTE-SERVER-AS IXLeeds Limited | — | — | 0 |
| AS39530GB | parker James Parker | — | — | 0 |
| AS197976GB | FAVBET-AS Favbet Invest LLP | — | — | 0 |
| AS198372GB | wowfi-as Futility Ltd | — | — | 0 |
| AS57114GB | DEDISHACK Dedishack Ltd | — | — | 0 |
| AS21321GB | NETUITY-AS BITNIFTY LTD | — | — | 0 |
| AS205441GB | LUMO Lumo Cloud Limited | — | — | 0 |
| AS210396GB | broadwaypartners Voneus Ltd | — | — | 0 |
| AS204789GB | BizbetaLTD BIZBETA LTD | — | 68.6K | 17 |
| AS212931GB | OSCARMUSICRAND Oscar Music & Media Ltd. | — | — | 0 |
| AS214665GB | PROJECT-PC Adam Beddall | — | — | 0 |
| AS15635GB | YAHOO-UKL Yahoo-UK Limited | — | — | 0 |
| AS213085GB | LOGINELTDAS Internet Utilities Europe and Asia Limited | — | — | 0 |
| AS35375GB | CONSENSUSONE BITNIFTY LTD | — | — | 0 |
| AS43157GB | URBANWIMAX-NET Telcom Networks Limited | — | — | 0 |
| AS50871GB | IXBRADFORD IXBRADFORD LIMITED | — | — | 0 |
| AS211166GB | asserizyweb LOBOS NETWORKING LTD | — | — | 0 |
| AS206918GB | DWP Department for Work and Pensions | — | — | 0 |