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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 |
| 1 |
| 2 |
| AS214498GB | McLarenApplied Motion Applied Limited | 256 | 1 | 2 |
| AS207748GB | FRASER-AS Stephen Fraser | 256 | 260 | 6 |
| AS16339GB | VI-UK Virtual Internet (UK) Limited | 256 | — | 1 |
| AS197104GB | GENTOO-AS Gentoo Group Limited | 256 | — | 1 |
| AS60102GB | SOVA-CAPITAL Sova Capital Limited | 256 | — | 1 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |
| AS205885GB | cnetas01 Cloudnet IT Solutions Ltd | 256 | 65.5K | 2 |
| AS44426GB | SYNECTICS-AS Synectics Solutions Ltd | 256 | — | 1 |
| AS59809GB | AS21IN Numeric Futures Limited | 256 | — | 1 |
| AS47426GB | ADVITEL-AS Advitel Ltd | 256 | 1 | 2 |
| AS205772GB | LARMITGTOP-AS LARMITGTOP LTD | 256 | — | 1 |
| AS198892GB | MIXCLOUD-AS MIXCLOUD LTD | 256 | — | 1 |
| AS206512GB | TIGOVA TIGOVA NETWORK LIMITED | 256 | — | 1 |
| AS198789GB | AS_SPEEDY Speedy IP Services LTD | 256 | — | 1 |
| AS212031GB | BITSolutions-AS BIT Solutions Ltd | 256 | — | 1 |
| AS202288GB | MM Matthew Martin | 256 | 1 | 2 |
| AS202783GB | SWANN-MNT NHS National Services Scotland | 256 | — | 1 |
| AS207536GB | SEABECKSOLUTIONS-AS SEABECK SOLUTIONS LIMITED | 256 | — | 1 |
| AS59529GB | CME-AS-LO2-1 CME Operations Limited | 256 | — | 1 |
| AS204757GB | ReactiveMarkets Reactive Markets Limited | 256 | — | 1 |
| AS42460GB | Euralb_ASN Euralb-LTD | 256 | — | 1 |
| AS210025GB | XXSL Alice Cat Research Ltd | 256 | 10 | 11 |
| AS212606GB | DiPocket DiPocket Limited | 256 | — | 1 |
| AS211142GB | as_gaussmanltd CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS209503GB | Zentyx Zentyx Limited | 256 | — | 1 |
| AS200468GB | ALVAREZ ALVAREZ & MARSAL DISPUTES AND INVESTIGATIONS LLP | 256 | — | 1 |
| AS49793GB | IAIN-MCWILLIAMS-AS LMP Technical Services Ltd | 256 | 1 | 2 |
| AS214284GB | OTTCLUB-AS INTERNET MEDIA STREAM LTD | 256 | — | 1 |
| AS201815GB | MEGADITTA ItalPetrolCemenTermoTessilFarmoMetalChimica LTD | 256 | 16 | 2 |
| AS44268GB | JCB-AS J.C. BAMFORD EXCAVATORS LIMITED | 256 | — | 1 |
| AS214424GB | NFORTO-AS nForto Ltd | 256 | — | 1 |
| AS213119GB | ALZ-SOFTWARE-AS ALZ Software Ltd | 256 | — | 1 |
| AS206071GB | EA-DE-COLOGNE Electronic Arts Limited | 256 | — | 1 |
| AS50985GB | EA-UK-RUN Electronic Arts Limited | 256 | — | 1 |
| AS208393GB | DEDCLOUD Dedcloud Network Ltd | 256 | — | 1 |
| AS6540GB | SAMUEL-COSGROVE Samuel Cosgrove | 256 | — | 1 |
| AS200709GB | Flotek-Shared-MNT Flotek Group Limited | 256 | — | 1 |
| AS203253GB | CHERRYTOP-AS Cherrytop Ltd | 256 | 1 | 2 |
| AS202939GB | CHIMON-NETWORK Chimon Technology Ltd | 256 | 869 | 27 |
| AS199548GB | as_fnt_prm UrSolutions Ltd | 256 | — | 1 |
| AS204539GB | AXIC-Axivora-Connect-Ltd Axivora Connect Ltd | 256 | 59 | 15 |
| AS199738GB | VATORA VATORA LIMITED | 256 | 65.5K | 2 |
| AS219522GB | PUP Pupnet LTD | 256 | 1 | 2 |
| AS204776GB | Mintopia Jessica Smith | 256 | 257 | 3 |
| AS47744GB | ANNECTO-AS ANNECTO TELECOM LIMITED | 256 | — | 1 |
| AS49882GB | SKRILL Paysafe Holdings UK Limited | 256 | — | 1 |