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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 |
| 256 |
| 65.5K |
| 2 |
| AS43392GB | BLUEBAY-ASSET-AS RBC Global Asset Management (UK) Limited | 256 | — | 1 |
| AS137502GB | NOMINET-AS-AP - NOMINET UK | 256 | 1 | 2 |
| AS44268GB | JCB-AS J.C. BAMFORD EXCAVATORS LIMITED | 256 | — | 1 |
| AS204089GB | ADML Apollo Duck Media Ltd | 256 | 524.3K | 2 |
| AS34625GB | OSHS-AS OSHS Ltd | 256 | — | 1 |
| AS206981GB | TeritumDevelopment Christopher Mountford | 256 | 1 | 2 |
| AS49882GB | SKRILL Paysafe Holdings UK Limited | 256 | — | 1 |
| AS206987GB | MARCUSNAW Marcus Nawrocki | 256 | — | 1 |
| AS214323GB | MSH-UK Marcus Hughes | 256 | 2 | 3 |
| AS198231GB | SIXNET Sixnet Operation Ltd | 256 | — | 1 |
| AS215187GB | PROMISED God Promised Me Networks LTD | 256 | — | 1 |
| AS214731GB | ETO-AS ETO Networks Limited | 256 | 887 | 43 |
| AS205011GB | celertechuk Celer Technologies Limited | 256 | — | 1 |
| AS218388GB | LODESTAR LODESTAR NETWORKS LTD | 256 | 1 | 2 |
| AS49606GB | MCDEU01 MCD Europe Limited | 256 | — | 1 |
| AS39576GB | Prostack-Hosting Sharpstack Hosting Ltd | 256 | 1 | 2 |
| AS215527GB | XERONET Xero Networks LTD | 256 | 8 | 9 |
| AS44697GB | C3-UK Computer & Communication Co. Limited | 256 | — | 1 |
| AS207155GB | STORMNET Stormnet Hosting LTD | 256 | 1 | 2 |
| AS47578GB | PRT-ANYCAST PRT Systems Limited | 256 | 1 | 2 |
| AS60220GB | EA-UK-WIL Electronic Arts Limited | 256 | — | 1 |
| AS201375GB | NG-MKDC0 Datazero Ltd. | 256 | — | 1 |
| AS209230GB | SERVERNET-ASv SERVERNET INTERNET LIMITED | 256 | — | 1 |
| AS200581GB | TFWFIBRE-ASN TfW Fibre Ltd | 256 | 524.3K | 2 |
| AS198375GB | DELUSION-NET Delusion Limited | 256 | 1 | 2 |
| AS44426GB | SYNECTICS-AS Synectics Solutions Ltd | 256 | — | 1 |
| AS206822GB | CLOUDNET Clouvider Limited | 256 | — | 1 |
| AS199548GB | as_fnt_prm UrSolutions Ltd | 256 | — | 1 |
| AS204293GB | TinyHomeLab TinyHomeLab Ltd | 256 | 1 | 2 |
| AS213000GB | ASAML Alliance Medical Limited | 256 | — | 1 |
| AS206530GB | VOXYONDER VOXYONDER NETWORK SERVICES UK LTD | 256 | — | 1 |
| AS218393GB | FSL-SOFTWARE FSL Software Ltd | 256 | — | 1 |
| AS219522GB | PUP Pupnet LTD | 256 | 1 | 2 |
| AS200251GB | cwg Cineworld Cinemas Limited | 256 | — | 1 |
| AS211032GB | ASHALLSON LOBOS NETWORKING LTD | 256 | — | 1 |
| AS203589GB | HOSTWEAVE-AS HOSTWEAVE LTD | 256 | — | 1 |
| AS210192GB | TOPLINESYSTEMS Topline Systems Ltd | 256 | — | 1 |
| AS198337GB | DATAART-LVIV DataArt Technologies UK Ltd | 256 | — | 1 |
| AS197387GB | Betfair-DC3 The Sporting Exchange (Clients) Ltd | 256 | — | 1 |
| AS219115GB | TropicalHOST TROPICAL HOSTING LTD | 256 | 16 | 2 |
| AS21464GB | EDF-AS EDF Trading Ltd | 256 | — | 1 |
| AS47935GB | QUANTUMUK-AS Quantum Communications Ltd | 256 | 65.5K | 2 |
| AS209503GB | Zentyx Zentyx Limited | 256 | — | 1 |
| AS212486GB | kigen KIGEN (UK) LIMITED | 256 | — | 1 |
| AS219094GB | MCDADE William McDade | 256 | 2 | 3 |
| AS48686GB | SOLTECH-ASN oRe Networks Limited | 256 | 1 | 2 |