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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 |
| 3.3K |
| — |
| 13 |
| AS50056GB | VORBOSS-ORIG Vorboss Limited | 3.3K | — | 13 |
| AS198328GB | TRAYPORT-AS Trayport Limited | 3.3K | 655.4K | 10 |
| AS204260GB | RoS Registers of Scotland | 3.3K | — | 11 |
| AS211392GB | softbank DREAM CLOUD INNOVATION LIMITED | 3.3K | — | 13 |
| AS30933GB | PROTEXIA-EU KDA WEB SERVICES LTD | 3.3K | — | 6 |
| AS39097GB | MAINTEL-LTD-UK Maintel Europe Limited | 3.3K | — | 13 |
| AS210920GB | CIVO-FRANKFURT Civo LTD | 3.3K | — | 3 |
| AS200514GB | KnownSRV KnownSRV Ltd. | 3.3K | 2 | 15 |
| AS51439GB | AIG-EUROPE-SERVICES-LTD AIG Europe (Services) Limited | 3.3K | 3 | 9 |
| AS206715GB | UXHOST UXHOST LTD | 3.3K | 19 | 17 |
| AS51945GB | Enlink ENLINK LTD | 3.3K | 65.5K | 6 |
| AS16349GB | FON-AS-2 Fon Wireless LTD | 3.3K | 65.5K | 9 |
| AS39458GB | REALHOSTS-AS Real Hosts Limited | 3.3K | 65.5K | 4 |
| AS212396GB | FYFEWEB FyfeWeb Ltd | 3.3K | 3 | 16 |
| AS49546GB | VOICETEC-AS Voicetec sys Limited | 3.3K | — | 7 |
| AS31474GB | MTV-UK-AS Viacom International Media Networks U.K. Limited | 3.3K | — | 12 |
| AS203154GB | MITELIS-DOWNSTREAM MITELIS SECURITY LIMITED | 3.3K | — | 13 |
| AS199856GB | Ping-Telecommunications Ping Technology Labs LTD | 3.3K | 524.3K | 14 |
| AS44226GB | acturis Acturis Ltd | 3.3K | — | 6 |
| AS44646GB | Gamesys-NET Gamesys Ltd. | 3.3K | — | 13 |
| AS21339GB | ContingencyNetworks Contingency Networks Ltd | 3.3K | — | 7 |
| AS48825GB | fast2host Fast4networks Ltd | 3.3K | 65.5K | 4 |
| AS33921GB | Lebara-AS Lebara Ltd | 3.3K | 256 | 14 |
| AS52200GB | M5-AS M5 Limited | 3.1K | — | 3 |
| AS212633GB | EE-Mobile EE Mobile Telecom Ltd | 3.1K | 524.3K | 13 |
| AS202831GB | PACKETLOSS Packet Loss LTD | 3.1K | 65.8K | 276 |
| AS39846GB | ONEGA Onega Ltd | 3.1K | — | 5 |
| AS43463GB | BST-LT INFOCOM UK LTD | 3.1K | 256 | 10 |
| AS200083GB | SUB6 Sub 6 Limited | 3.1K | 65.5K | 3 |
| AS201855GB | uk-as-raymondjames RAYMOND JAMES INVESTMENT SERVICES LIMITED | 3.1K | — | 7 |
| AS211775GB | NGFL-ASN London Grid for Learning Trust | 3.1K | — | 4 |
| AS39382GB | OPTINIUMWH-AS Optinium Ltd | 3.1K | — | 2 |
| AS210099GB | TIGOVA TIGOVA NETWORK LIMITED | 3.1K | — | 12 |
| AS57307GB | BLAZE-NETWORKS Communicate Technology LTD | 3.1K | — | 2 |
| AS47625GB | UKHOST4U Paul David Hughes | 3.1K | — | 6 |
| AS51707GB | INNOVATION-CENTRE-MEDWAY-ASN Medway Towns Council | 3.1K | — | 3 |
| AS25462GB | RETN-UA-AS RETN Limited | 3.1K | — | 2 |
| AS52063GB | SYSTEMIP TTP Cloud Group Ltd | 3.1K | 65.5K | 3 |
| AS200658GB | CoreCloud CoreCloud Systems Ltd | 3.1K | — | 12 |
| AS39730GB | EIRCOM-UK Eircom (UK) Ltd | 3.1K | 524.3K | 3 |
| AS51409GB | SIPSYNERGY Sipsynergy Limited | 3.1K | — | 12 |
| AS44205GB | INDIGOICS Indigo Integrated Solutions Limited | 3.1K | 1.6M | 6 |
| AS58246GB | LothianBroadband Highland Broadband Networks Limited | 3.1K | 524.3K | 4 |
| AS206237GB | BARCLAYS_BPS Barclays Bank PLC | 3.1K | — | 7 |
| AS28863GB | Thales-SCS Thales UK Limited | 3.1K | — | 5 |
| AS31256GB | WARWICKSHIRECC Warwickshire County Council | 3.1K | — | 2 |