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How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.
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 |
| 2K |
| 65.5K |
| 2 |
| AS211389GB | briantbroadband Briant Broadband Limited | 2K | 524.3K | 7 |
| AS210970GB | mosento mosento LTD | 2K | — | 8 |
| AS21188GB | UNILEVER-ES-UK Unilever PLC | 2K | — | 4 |
| AS206999GB | oakfordis Oakford Internet Services Ltd | 2K | — | 8 |
| AS49829GB | ADM-ASN ADM COMPUTER SERVICES LIMITED | 2K | — | 3 |
| AS25108GB | IOMART-APAC-AS Iomart Managed Services Limited | 2K | 65.5K | 6 |
| AS197370GB | NOTTSCC Nottinghamshire County Council | 2K | — | 1 |
| AS34737GB | QinetiQ-ISP Qinetiq Limited | 2K | — | 4 |
| AS60925GB | BPP-ASN BPP Services Limited | 2K | — | 1 |
| AS204914GB | LABIXE LABIXE LTD | 2K | 1 | 9 |
| AS201358GB | FNZ-UK FNZ (UK) Ltd | 2K | — | 3 |
| AS34134GB | FREECLIX FreeClix Ltd | 2K | 524.3K | 5 |
| AS210757GB | BSL Blackbird Solutions Limited | 2K | — | 5 |
| AS49694GB | UK-FR-MNLTD Masternaut Limited | 2K | 3 | 11 |
| AS35299GB | ASC2k C2k | 2K | — | 1 |
| AS208522GB | uk-optimus Optimus Networks LTD | 2K | — | 3 |
| AS50063GB | SAINSBURYS-NET Sainsbury's Supermarkets Ltd | 2K | — | 1 |
| AS203987GB | VYSIION-AS Vysiion Limited | 2K | — | 2 |
| AS203842GB | AcoraAPC-AS Acora Limited | 2K | — | 2 |
| AS205693GB | dvla Driver & Vehicle Licensing Agency | 2K | — | 4 |
| AS35259GB | APM APM Internet Ltd | 2K | — | 1 |
| AS31003GB | IRON-MOUNTAIN-UK-AS Iron Mountain Europe (Group) Limited | 2K | — | 2 |
| AS209611GB | HFLBROADBAND HFLBroadband Ltd | 2K | — | 3 |
| AS207195GB | ipwholesale Intelligent Exchanges Limited | 2K | 524.3K | 4 |
| AS28729GB | FORD-AS Ford Motor Company Limited | 2K | 1 | 2 |
| AS34746GB | AXA_INSURANCE AXA Insurance UK plc | 2K | — | 1 |
| AS44442GB | TelfordWrekinCouncilAS The Borough of Telford and Wrekin Council | 2K | — | 1 |
| AS49247GB | ESFRS East Sussex Fire Authority | 2K | — | 1 |
| AS209761GB | NECS North of England Commissioning Support Unit | 2K | — | 3 |
| AS205373GB | rightmove Rightmove Group Limited | 2K | 65.5K | 10 |
| AS209738GB | IONFIBRE CURVE INFORMATION TECHNOLOGY LIMITED | 2K | — | 8 |
| AS34654GB | IONIC-AS Merula Limited | 2K | — | 1 |
| AS138177GB | NOMINET-AS-AP-RESMDNS - NOMINET UK | 2K | 9 | 17 |
| AS201542GB | micloud Mitel Networks Limited | 2K | — | 5 |
| AS48447GB | Sectigo Sectigo Limited | 1.8K | 65.5K | 5 |
| AS198386GB | ONI THRIVE OPERATIONS LIMITED | 1.8K | — | 4 |
| AS49418GB | AS-NETSHIELD NETSHIELD LTD | 1.8K | 67 | 11 |
| AS201715GB | ineedbr Ineedbroadband Ltd | 1.8K | — | 4 |
| AS198990GB | PINEHOST-NET Pine Hosting LTD | 1.8K | — | 4 |
| AS56718GB | INTOUCH-BROADBAND Redshelf Ltd | 1.8K | 131.6K | 11 |
| AS41099GB | globalreach Global Reach Networks Limited | 1.8K | — | 7 |
| AS204154GB | FIRST-SERVER-US-AS FIRST SERVER LIMITED | 1.8K | 1 | 7 |
| AS205290GB | NAOBOROT-AS NAOBOROT LLP | 1.8K | — | 7 |
| AS60841GB | BERRYBYTE berrybyte Limited | 1.8K | 258 | 10 |
| AS203185GB | PebbleTree PEBBLETREE LTD | 1.8K | 3 | 10 |
| AS42237GB | w1n w1n ltd | 1.8K | 655.4K | 17 |