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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 |
| zonebroadband Zone Telecommunications Ltd |
| 768 |
| — |
| 2 |
| AS60200GB | VCC-UK Victor Connect Ltd. | 768 | — | 3 |
| AS204242GB | TRUTECS-AS Trutec Services | 768 | — | 3 |
| AS201226GB | LEASINGOPTIONSLTD-AS Leasing Options Limited | 768 | — | 2 |
| AS211678GB | MYFI-AS Michaelston y Fedw Internet CIC | 768 | 524.3K | 3 |
| AS201949GB | SEEDTECHNOLOGIES Seed Technologies LTD. | 768 | 2 | 5 |
| AS6911GB | PRO-NET Associated Networks (UK) Limited | 768 | — | 2 |
| AS209134GB | REVOPCI Atmoso Limited | 768 | — | 3 |
| AS215675GB | perceptiontvcdn Perception TVCDN Ltd | 768 | — | 3 |
| AS207009GB | UK-FUTURE Future Publishing Ltd | 768 | 65.5K | 3 |
| AS41415GB | square-enix Square Enix Limited | 768 | — | 3 |
| AS202595GB | SQUIZUS Squiz UK Limited | 768 | — | 2 |
| AS8336GB | InnovationGrpEMEA THE INNOVATION GROUP (EMEA) LTD | 768 | — | 3 |
| AS48553GB | MARKETAXESS Marketaxess Europe Ltd | 768 | — | 3 |
| AS202154GB | brevanhoward Brevan Howard Asset Management LLP | 768 | — | 3 |
| AS43408GB | OCD-UK Orange Cyberdefense UK Limited | 768 | 1 | 4 |
| AS206798GB | UK-Huawei HUAWEI TECHNOLOGIES(UK)CO.,LTD | 768 | — | 2 |
| AS59907GB | IMSHealth IQVIA SOLUTIONS HQ LTD | 768 | — | 3 |
| AS213840GB | DDOS-PROTECTION-LTD DDOS PROTECTION LTD | 768 | — | 3 |
| AS215854GB | DC-3-PROJECT Exponential-E Ltd. | 768 | — | 3 |
| AS202364GB | gridh Grid Hosting Limited | 768 | — | 3 |
| AS48611GB | CABLESTREET-AS Cablestreet Ltd | 768 | 196.6K | 6 |
| AS199720GB | icbcs ICBC Standard Bank PLC | 512 | — | 2 |
| AS34623GB | Netegral Astutium Limited | 512 | 1 | 2 |
| AS58102GB | TWODMEDIA 2Dmedia Ltd. | 512 | 1 | 2 |
| AS211760GB | CCL-LDN Cleveland Clinic London Ltd | 512 | — | 2 |
| AS210253GB | CREATIVE-NETWORK-CONSULTING-AS Creative Network Consulting Limited | 512 | — | 2 |
| AS205359GB | precisely-ltd Precisely Software Ltd | 512 | — | 2 |
| AS203251GB | AlchemySystems Alchemy Systems International Limited | 512 | — | 1 |
| AS201301GB | soundmouse-netwise Soundmouse Ltd | 512 | 131.1K | 4 |
| AS51823GB | MTNETWORKSLTD Microtalk Europe Ltd | 512 | — | 2 |
| AS199794GB | EMO-AS EMOCLOUD LTD | 512 | 528 | 5 |
| AS39592GB | IGX0-AS Benjamin Ashton | 512 | — | 2 |
| AS48682GB | IPSL IP Space Limited | 512 | — | 2 |
| AS50287GB | AudatexUK Audatex (UK) Ltd | 512 | 16 | 3 |
| AS60898GB | AQUIS-EXCHANGE Aquis Exchange Limited | 512 | — | 2 |
| AS50078GB | X-ON X-ON HEALTH LIMITED | 512 | — | 2 |
| AS34930GB | HAL LHR AIRPORTS LIMITED | 512 | — | 2 |
| AS197213GB | NINETY-ONE-TELECOM 91TELECOM LTD | 512 | 17 | 4 |
| AS42635GB | AS-RCKR CARDOCK HOSTING LIMITED | 512 | — | 2 |
| AS199285GB | CONARX Conarx, Ltd | 512 | 2 | 4 |
| AS214722GB | LHGE Lighthouse Global Europe Limited | 512 | — | 2 |
| AS49313GB | SEVAHOST-AS Seva-Host Ltd | 512 | — | 2 |
| AS57483GB | ICHILTON Ian Chilton | 512 | 14 | 16 |
| AS198142GB | Warrington-AS Warrington Borough Council | 512 | — | 2 |
| AS208026GB | LITTLEWOODS LITTLEWOODS LTD | 512 | — | 2 |
| AS50632GB | NU-COLO-NET Fish.Net Limited | 512 | — | 1 |