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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 | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
| 256 |
| 1 |
| 2 |
| AS198789GB | AS_SPEEDY Speedy IP Services LTD | 256 | — | 1 |
| AS207601GB | EA-FR-LYON Electronic Arts Limited | 256 | — | 1 |
| AS202532GB | MBYTECHNOLOGY Mbytechnology Limited | 256 | — | 1 |
| AS206457GB | EA-IE-GALWAY Electronic Arts Limited | 256 | — | 1 |
| AS39576GB | Prostack-Hosting Sharpstack Hosting Ltd | 256 | 1 | 2 |
| AS204055GB | CentralNic-Anycast-H CentralNic Ltd | 256 | 1 | 2 |
| AS212459GB | CELERTECH-SG1 Celer Technologies Limited | 256 | — | 1 |
| AS202443GB | WINE-AS WINE AND FOOD PARTNERS LTD | 256 | 1 | 2 |
| AS213565GB | Badonde-Networks David Davies | 256 | 65.5K | 3 |
| AS212729GB | ERL Everlight Radiology Limited | 256 | — | 1 |
| AS60758GB | DMC-AS Deluxe UK Holdings Limited | 256 | — | 1 |
| AS59902GB | Frankfurt IQVIA SOLUTIONS HQ LTD | 256 | — | 1 |
| AS208723GB | VDX-SYSTEMS VDX SYSTEMS LTD | 256 | 4 | 5 |
| AS202288GB | MM Matthew Martin | 256 | 1 | 2 |
| AS207080GB | Basil-Fillan Jack Fillan | 256 | 65.5K | 2 |
| AS34675GB | PIH-UK Prima Internet Holdings Limited | 256 | — | 1 |
| AS39715GB | platinumhedgehog PLATINUM HEDGEHOG CONSULTANCY LIMITED | 256 | — | 1 |
| AS208623GB | Threadneedle_MNT Threadneedle Asset Management Holdings Ltd | 256 | — | 1 |
| AS44782GB | UK-FOREX-AS Stratos Markets Limited | 256 | — | 1 |
| AS42875GB | NCP-AS National Car Parks Limited | 256 | — | 1 |
| AS208150GB | uk-eagle Eagle Aquila Ltd | 256 | — | 1 |
| AS150325GB | TSUKUDANI-NETWORK - TSUKUDANI NETWORK | 256 | 4 | 5 |
| AS213185GB | ETA-AS Eta Heese | 256 | 1 | 2 |
| AS213272GB | BFC-SY3 Beeks Financial Cloud Ltd | 256 | — | 1 |
| AS197958GB | Ogilvie-Communications NET DEFENCE LIMITED | 256 | — | 1 |
| AS203094GB | ORG-CCL119-RIPE COMMUNITY CABLE LTD | 256 | — | 1 |
| AS205492GB | SCHRODERS-ZUR-AS Schroder Investment Management Limited | 256 | — | 1 |
| AS201323GB | host-media-ltd Host Media Ltd | 256 | 65.5K | 2 |
| AS211165GB | asbattyhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS205936GB | ASCOULDIT COULD IT HOSTING LIMITED | 256 | — | 1 |
| AS199204GB | WebMate Webmate Internet Services Ltd. | 512 | — | 1 |
| AS203184GB | FNZ-EU FNZ HOLDINGS UK LIMITED | 512 | — | 2 |
| AS199720GB | icbcs ICBC Standard Bank PLC | 512 | — | 2 |
| AS60688GB | CSPCORE CSP Partnership | 512 | — | 1 |
| AS50078GB | X-ON X-ON HEALTH LIMITED | 512 | — | 2 |
| AS197342GB | Aepona-BFS PERSISTENT SYSTEMS UK LIMITED | 512 | — | 2 |
| AS51329GB | CONNET-AS CONNECTION NETWORKS L.P. | 512 | — | 2 |
| AS59876GB | SHELFSPACE Thomas James Elliott | 512 | 1 | 3 |
| AS210253GB | CREATIVE-NETWORK-CONSULTING-AS Creative Network Consulting Limited | 512 | — | 2 |
| AS212646GB | SSLN-AS Sporting Solutions Services Limited | 512 | — | 2 |
| AS202610GB | NEKO-AS NekoClaw Ltd | 512 | 2 | 4 |
| AS57483GB | ICHILTON Ian Chilton | 512 | 14 | 16 |
| AS200008GB | PIRUM-AS Pirum Systems Limited | 512 | 524.3K | 3 |
| AS200203GB | DATABRIDGE GLOBAL DATA BRIDGE INTERNATIONAL LIMITED | 512 | 8.2K | 4 |
| AS206246GB | Formosa FORMOSA CAPITAL LP | 512 | — | 2 |
| AS58102GB | TWODMEDIA 2Dmedia Ltd. | 512 | 1 | 2 |