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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 | 168 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 340 |
| AS212238GB | CDNEXT Datacamp Limited | 1M | 4,127 |
| 256 |
| — |
| 1 |
| AS49728GB | HEREFORDSHIRE-COUNCIL Herefordshire Council | 256 | — | 1 |
| AS208755GB | NETWORKABLE Thomas Ferguson | 256 | — | 1 |
| AS201230GB | PENINSULA-AS Peninsula Business Services Ltd | 256 | — | 1 |
| AS202288GB | MM Matthew Martin | 256 | 1 | 2 |
| AS214670GB | NOMETRIC-NET No Metric Limited | 256 | 131.1K | 3 |
| AS213016GB | holker-network-solutions Holker Network Solutions Ltd | 256 | — | 1 |
| AS49049GB | BATH-NORTH-EAST-SOMERSET-COUNCIL Bath North East Somerset Council | 256 | — | 1 |
| AS205676GB | DCE Data Center Experts LTD | 256 | — | 1 |
| AS58007GB | Witine Witine Limited | 256 | — | 1 |
| AS208150GB | uk-eagle Eagle Aquila Ltd | 256 | — | 1 |
| AS202587GB | UMOJA-AS C2C Ltd | 256 | — | 1 |
| AS35241GB | vostel Vostel Limited | 256 | — | 1 |
| AS198789GB | AS_SPEEDY Speedy IP Services LTD | 256 | — | 1 |
| AS204318GB | BGPTOOLS-QA Benjamin Cartwright-Cox | 256 | 82.1K | 177 |
| AS48632GB | BTS-HOLDINGS-PLC BTS HOLDINGS PLC | 256 | — | 1 |
| AS214079GB | LENDNODES LendNodes LTD | 256 | 16 | 2 |
| AS8272GB | NETSCALIBUR-UK Claranet Limited | 256 | — | 1 |
| AS207734GB | Quika COMMERCIS ME LTD | 256 | — | 1 |
| AS199131GB | CITY-OF-YORK-COUNCIL City of York Council | 256 | — | 1 |
| AS197284GB | K3X-MNT K3X SYSTEMS Ltd | 256 | 1 | 2 |
| AS202443GB | WINE-AS WINE AND FOOD PARTNERS LTD | 256 | 1 | 2 |
| AS29200GB | ESEYE Eseye Ltd | 256 | 524.3K | 2 |
| AS39715GB | platinumhedgehog PLATINUM HEDGEHOG CONSULTANCY LIMITED | 256 | — | 1 |
| AS59813GB | DELIGHTFIBER-AS Konstantin Verba | 256 | 65.5K | 2 |
| AS215636GB | NUSO-FRA NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS49781GB | b4rk Broadband for Rural Kent Ltd | 256 | — | 1 |
| AS47988GB | PHOTOSOFPICKLES Charles Allom | 256 | 1 | 2 |
| AS202359GB | glauca-carrier AS207960 Cyfyngedig | 256 | 5 | 6 |
| AS211120GB | as_grootwebhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS39617GB | CONSULTANCY-ASN Chris Burton | 256 | 1 | 2 |
| AS209340GB | TIG-Network-EU1 TIG Management Services Limited | 256 | — | 1 |
| AS30894GB | SINCH-MBLOX-AS SINCH UK LTD. | 256 | — | 1 |
| AS215303GB | Qubitbytes Qubitbytes LTD | 256 | — | 1 |
| AS199948GB | EXPANSE-NETWORKS Cosmorack Ltd | 256 | 1 | 2 |
| AS212195GB | nexstor-as Nexstor Ltd | 256 | — | 1 |
| AS213831GB | Toby Toby Dixon | 256 | — | 1 |
| AS207925GB | SQUIRREL-HQ Squirrel Internet Ltd | 256 | 131.1K | 3 |
| AS206512GB | TIGOVA TIGOVA NETWORK LIMITED | 256 | — | 1 |
| AS207960GB | AS-TRANSRIGHTS AS207960 Cyfyngedig | 256 | 7 | 8 |
| AS209080GB | ASN-EDFMAN E D & F MAN TECHNOLOGY LIMITED | 256 | — | 1 |
| AS203105GB | BlahajInternet Blahaj Internet Ltd | 256 | 1 | 2 |
| AS25464GB | TELESIGN-AS Telesign Mobile Limited | 256 | — | 1 |
| AS213798GB | POWELL-AS Jude Gabriel Powell | 256 | 282 | 13 |
| AS204220GB | STARLONDON-AS Star Europe Limited | 256 | — | 1 |
| AS12613GB | FIREBRICK-AS Firebrick Limited | 256 | — | 1 |
| AS39576GB | Prostack-Hosting Sharpstack Hosting Ltd | 256 | 1 | 2 |