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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 |
| AS202808GB | LOGIENET Blairlogie Community and Heritage Trust | 256 | — | 1 |
| AS214214GB | Threadneedle_MNT Threadneedle Asset Management Holdings Ltd | 256 | — | 1 |
| AS208907GB | RISING-BRIDGE-TECHNOLOGY Rising Bridge Technology Ltd | 256 | 1 | 2 |
| AS212486GB | kigen KIGEN (UK) LIMITED | 256 | — | 1 |
| AS59756GB | ENQUEST-AS Enquest Britain Limited | 256 | — | 1 |
| AS209220GB | AblativeHosting Ablative Hosting Ltd | 256 | 1 | 2 |
| AS211437GB | SurlyNet Gareth Woolridge | 256 | 16 | 2 |
| AS9014GB | CEFAS Centre for Environment Fisheries and Aquaculture Science (CEFAS) | 256 | — | 1 |
| AS41548GB | MEDWAY-AS Medway Council | 256 | — | 1 |
| AS215187GB | PROMISED God Promised Me Networks LTD | 256 | — | 1 |
| AS51303GB | Warsaw IQVIA SOLUTIONS HQ LTD | 256 | — | 1 |
| AS211165GB | asbattyhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS197284GB | K3X-MNT K3X SYSTEMS Ltd | 256 | 1 | 2 |
| AS47219GB | NTT_GDC_Anycast NTT Global Data Centers EMEA UK Ltd. | 256 | 1 | 2 |
| AS29019GB | MORNINGSTAR-EUROPE Morningstar Europe Limited | 256 | — | 1 |
| AS197106GB | TRPI-EU-AS T. Rowe Price International LTD | 256 | — | 1 |
| AS212705GB | TIG-Network TIG Management Services Limited | 256 | 524.3K | 2 |
| AS207536GB | SEABECKSOLUTIONS-AS SEABECK SOLUTIONS LIMITED | 256 | — | 1 |
| AS51392GB | FUSIONED Fusioned Ltd | 256 | 65.5K | 2 |
| AS212606GB | DiPocket DiPocket Limited | 256 | — | 1 |
| AS198472GB | MANCHESTER-CC-AS Manchester City Council | 256 | — | 1 |
| AS202939GB | CHIMON-NETWORK Chimon Technology Ltd | 256 | 869 | 27 |
| AS59617GB | ANDYD Andy Davidson | 256 | 1 | 2 |
| AS218388GB | LODESTAR LODESTAR NETWORKS LTD | 256 | 1 | 2 |
| AS218513GB | STPD-NETWORK Joshua Noakes | 256 | 2 | 3 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |
| AS44268GB | JCB-AS J.C. BAMFORD EXCAVATORS LIMITED | 256 | — | 1 |
| AS215959GB | NUSOUKMAN NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS211244GB | CANIDAE-SYSTEMS Harley Tomas Watson | 256 | 1 | 2 |
| AS204757GB | ReactiveMarkets Reactive Markets Limited | 256 | — | 1 |
| AS215527GB | XERONET Xero Networks LTD | 256 | 8 | 9 |
| AS212068GB | ALIOTH Alioth Systems Limited | 256 | 18 | 4 |
| AS209669GB | PRIMONET-AS Ashley Primo | 256 | 3 | 4 |
| AS39617GB | CONSULTANCY-ASN Chris Burton | 256 | 1 | 2 |
| AS202275GB | GTSUK-AS Gaming Technology Solutions Ltd. | 256 | 1 | 2 |
| AS203961GB | CentralNic-Anycast-G CentralNic Ltd | 256 | 1 | 2 |
| AS208147GB | Snuggle Evie Snuggle | 256 | 1 | 2 |
| AS210025GB | XXSL Alice Cat Research Ltd | 256 | 10 | 11 |
| AS218713GB | NETCENSUS-AS NETCENSUS LTD | 256 | 2 | 3 |
| AS212124GB | UPMIND Upmind Automation Limited | 256 | — | 1 |
| AS201529GB | ORCHID-CELLMARK-ABINGDON Orchid Cellmark Ltd | 256 | 1 | 2 |
| AS47534GB | VocaLink-north-Ltd VOCALINK LTD | 256 | — | 1 |
| AS60698GB | LINXNETWORKS Linx-Networks-UK Ltd | 256 | — | 1 |
| AS205936GB | ASCOULDIT COULD IT HOSTING LIMITED | 256 | — | 1 |
| AS198789GB | AS_SPEEDY Speedy IP Services LTD | 256 | — | 1 |
| AS210005GB | easysoft Easysoft Ltd | 256 | — | 1 |