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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 |
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| 0 |
| AS201508GB | Connexin Connexin Limited | — | — | 0 |
| AS200639GB | Cross-Computing-Services Cross Computing Services Limited | — | — | 0 |
| AS207200GB | Krisdev Kristian Hoyle-Johnson | — | — | 0 |
| AS211284GB | JOSH_MILES Joshua Miles | — | — | 0 |
| AS213729GB | RikkiNet Rikki Network Limited | — | 1 | 1 |
| AS49182GB | BTEngageIT British Telecommunications Limited | — | — | 0 |
| AS218282GB | WESTTECH-AS WESTTECH LTD | — | — | 0 |
| AS5519GB | Wavenet-AS5519 Wavenet Limited | — | — | 0 |
| AS12852GB | EASYNETES-AS GTT - EMEA Ltd. | — | — | 0 |
| AS12755GB | COLT Technology Services Group Limited | — | — | 0 |
| AS219203GB | CODERWAY-AS Coderway Limited | — | — | 0 |
| AS25314GB | CCUK1 Clear Connect Limited | — | — | 0 |
| AS59893GB | FRC-AS Free Range Cloud Ltd. | — | 4 | 4 |
| AS208576GB | aam-uk Arts Alliance Media Ltd | — | — | 0 |
| AS205749GB | Intelligent-Communitycations-125-Ltd INTELLIGENT COMMUNITYCATIONS 125 LTD | — | — | 0 |
| AS207663GB | PARKIN Paul Parkin | — | — | 0 |
| AS200642GB | CAVL-AS Cavellon Ltd. | — | — | 0 |
| AS200535GB | INITARA-AS Initara Ltd | — | — | 0 |
| AS199186GB | daniel Daniel Thomas Atkinson | — | — | 0 |
| AS49738GB | NX-AS 3nt solutions LLP | — | — | 0 |
| AS214602GB | DATACENTER-CLUSTER-FL-AS FIRST SERVER LIMITED | — | 65.5K | 1 |
| AS57650GB | NOMIOS-ASN Nomios UK&I Limited | — | — | 0 |
| AS57114GB | DEDISHACK Dedishack Ltd | — | — | 0 |
| AS43251GB | SURFCONTROL-READING Forcepoint Overseas Limited | — | — | 0 |
| AS212759GB | ASN-Trogon Trogon Group Ltd | — | — | 0 |
| AS58285GB | ASSIXOP Sixnet Operation Ltd | — | 10.6M | 256 |
| AS12640GB | COLT Technology Services Group Limited | — | — | 0 |
| AS218191GB | MOOREQUALITY-AS MOORE QUALITY ENGINEERING LTD | — | — | 0 |
| AS8457GB | INDEXSCOPE LIMITED | — | — | 0 |
| AS213608GB | CONNECTOM CONNECTOM LTD | — | — | 0 |
| AS212885GB | UK-NATWEST-AS212885 Natwest Markets PLC | — | — | 0 |
| AS211658GB | STRATUS_AS Unity World Ltd | — | — | 0 |
| AS35375GB | CONSENSUSONE BITNIFTY LTD | — | — | 0 |
| AS52076GB | ALGOSPAN-AS PICO GLOBAL LTD. | — | — | 0 |
| AS206036GB | DRT-EXCHANGE Digital Realty (UK) Limited | — | — | 0 |
| AS201696GB | SHAMILNET Shamil Nunhuck | — | — | 0 |
| AS203438GB | RGSL Regus Group Services Ltd | — | — | 0 |
| AS206509GB | KCOM-UK-AS KCOM Group Limited | — | — | 0 |
| AS198382GB | FIRSTEASY-AS Datum Datacentres Limited | — | — | 0 |
| AS60899GB | ATECHMEDIA-AS Krystal Hosting Ltd | — | — | 0 |
| AS35082GB | TALKSTRAIGHT-AS Talk Straight Ltd. | — | — | 0 |
| AS211035GB | PHANTOM-HIVE-AS PHANTOM HIVE NETWORK LTD | — | 2 | 2 |
| AS39139GB | Menzies-Aviation-PLC-AS Menzies Aviation Plc | — | — | 0 |
| AS216126GB | James-Ledger James Ledger | — | 13 | 13 |
| AS35143GB | BICOMDOO Bicom Systems Limited | — | — | 0 |
| AS8276GB | VONESERVICES Vone Services Ltd | — | — | 0 |