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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.
3,143 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 172 |
| AS212238GB | CDNEXT Datacamp Limited | 1.2M | 4,613 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 404 |
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| 0 |
| AS210683GB | syo Syo Limited | — | 1 | 1 |
| AS24670GB | COHTECH01-AS Coherent Technology Solutions Limited | — | — | 0 |
| AS204291GB | pinguin Thomas McLoughlin | — | 337 | 7 |
| AS12852GB | EASYNETES-AS GTT - EMEA Ltd. | — | — | 0 |
| AS199398GB | LDNFLATS-AS LDNFLATS LTD | — | — | 0 |
| AS214116GB | AcoraAPC2-AS Acora Limited | — | — | 0 |
| AS212784GB | Marykirk-com Buchan Consultancy Services Ltd | — | — | 0 |
| AS49182GB | BTEngageIT British Telecommunications Limited | — | — | 0 |
| AS218776GB | FULLFIBER FULLFIBER LTD | — | 7 | 7 |
| AS205464GB | dyfedit Voneus Ltd | — | — | 0 |
| AS201357GB | DPNET-FAST DPNET FAST RELIABLE HOSTING VPS CLOUD SOLUTIONS LTD | — | — | 0 |
| AS204037GB | qernal Qernal LTD | — | — | 0 |
| AS207328GB | THRIVE-UK2 THRIVE OPERATIONS LIMITED | — | — | 0 |
| AS198862GB | AS_MOVE We Move Bits LTD | — | — | 0 |
| AS60257GB | OB-Telecom-Limited TalkTalk Communications Limited | — | — | 0 |
| AS207663GB | PARKIN Paul Parkin | — | — | 0 |
| AS210338GB | PIXSAL-AS Kieran Breeze | — | 3 | 3 |
| AS47386GB | TRIJITNET-UK TRIJIT LIMITED | — | — | 0 |
| AS59893GB | FRC-AS Free Range Cloud Ltd. | — | 4 | 4 |
| AS57114GB | DEDISHACK Dedishack Ltd | — | — | 0 |
| AS33898GB | TMOBILE-AS EE Limited | — | — | 0 |
| AS25041GB | AWS-DX British Telecommunications Limited | — | — | 0 |
| AS8802GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS8844GB | COMMUNITY GTT - EMEA Ltd. | — | — | 0 |
| AS214160GB | SHREE Shreejal Maharjan | — | 3 | 3 |
| AS213608GB | CONNECTOM CONNECTOM LTD | — | — | 0 |
| AS214602GB | DATACENTER-CLUSTER-FL-AS FIRST SERVER LIMITED | — | 65.5K | 1 |
| AS212404GB | Integral Jones Lang LaSalle Ltd | — | — | 0 |
| AS206637GB | IQIP-AS CSL (DualCom) Limited | — | — | 0 |
| AS206509GB | KCOM-UK-AS KCOM Group Limited | — | — | 0 |
| AS205441GB | LUMO Lumo Cloud Limited | — | — | 0 |
| AS210396GB | broadwaypartners Voneus Ltd | — | — | 0 |
| AS218198GB | ZaNet-Networks ZANET LTD | — | — | 0 |
| AS206976GB | KADFIRE Kadfire Limited | — | — | 0 |
| AS197677GB | BENWELL-AS Mr David John Benwell | — | — | 0 |
| AS198382GB | FIRSTEASY-AS Datum Datacentres Limited | — | — | 0 |
| AS44981GB | Oosha Oosha Ltd | — | — | 0 |
| AS44402GB | GFINET-AS GFI Holdings Limited | — | — | 0 |
| AS39139GB | Menzies-Aviation-PLC-AS Menzies Aviation Plc | — | — | 0 |
| AS201258GB | CRYPTIDZ Chaos Cupit | — | — | 0 |
| AS216364GB | uk-globalreachtech Global Reach Technology EMEA Limited | — | 8.2K | 2 |
| AS8276GB | VONESERVICES Vone Services Ltd | — | — | 0 |
| AS212479GB | RaziNetwork RAZINETWORK LTD | — | — | 0 |
| AS43629GB | VM-GCN Virgin Media Limited | — | — | 0 |
| AS211284GB | JOSH_MILES Joshua Miles | — | — | 0 |
| AS211209GB | EUROPEANEDGE-IX AIRBYTES COMMUNICATIONS Limited | — | — | 0 |