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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.
3,132 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 369 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,286 |
| 512 |
| 65.5K |
| 3 |
| AS214722GB | LHGE Lighthouse Global Europe Limited | 512 | — | 2 |
| AS33981GB | TSYS-AS Total System Services Processing Europe Limited | 512 | — | 2 |
| AS42635GB | AS-RCKR CARDOCK HOSTING LIMITED | 512 | — | 2 |
| AS206332GB | ARROW Arrow Business Communications Limited | 512 | 65.5K | 3 |
| AS213287GB | Pure-IP-Europe-BV Pure IP Limited | 512 | — | 1 |
| AS202310GB | hyve-corp Hyve Ltd | 512 | 2 | 2 |
| AS43178GB | TECHNOLABS Technolabs Networks Ltd. | 512 | — | 1 |
| AS43669GB | ACSL2 Axia Computer Systems Limited | 512 | — | 2 |
| AS219463GB | THEBATTLE-GROUP-LTD THEBATTLE GROUP LTD | 512 | — | 2 |
| AS208417GB | EONSCOPE SECUREEND LTD | 512 | — | 2 |
| AS41596GB | WGSL-AS Willis Group Services Ltd | 512 | — | 2 |
| AS210924GB | SSDNetworks SSD Networks Limited | 512 | 524.3K | 3 |
| AS35559GB | SOMEADDRESS Someaddress Networks Ltd | 512 | 2 | 2 |
| AS60654GB | METD-AS Metdesk Ltd | 512 | — | 2 |
| AS199285GB | CONARX Conarx, Ltd | 512 | 2 | 4 |
| AS206479GB | AceRDP AceRDP Ltd | 512 | — | 2 |
| AS35106GB | MICROSOFT-LIVE-MEETING Microsoft Limited | 512 | 1 | 2 |
| AS56644GB | SYNFS-AS Fundtech Financial Messaging Ltd | 512 | — | 2 |
| AS51823GB | MTNETWORKSLTD Microtalk Europe Ltd | 512 | — | 2 |
| AS199794GB | EMO-AS EMOCLOUD LTD | 512 | 784 | 6 |
| AS206166GB | SCHRODERS-UK-AS Schroder Investment Management Limited | 512 | — | 2 |
| AS39592GB | IGX0-AS Benjamin Ashton | 512 | — | 2 |
| AS50078GB | X-ON X-ON HEALTH LIMITED | 512 | — | 2 |
| AS57740GB | HERMES-DATACOMMS Hermes Datacommunications International Limited | 512 | — | 2 |
| AS219326GB | SULAVIL SULAVI LTD | 512 | — | 2 |
| AS50287GB | AudatexUK Audatex (UK) Ltd | 512 | 16 | 3 |
| AS209735GB | LAGRANGE Lagrange Cloud Technologies Limited | 512 | 2 | 4 |
| AS51692GB | HyberHost Steven Smith trading as HyberHost | 512 | 33 | 5 |
| AS199720GB | icbcs ICBC Standard Bank PLC | 512 | — | 2 |
| AS198142GB | Warrington-AS Warrington Borough Council | 512 | — | 2 |
| AS215675GB | perceptiontvcdn Perception TVCDN Ltd | 512 | — | 2 |
| AS216307GB | HYPERHOST-AS Hyperhost Solutions Limited | 512 | 1 | 3 |
| AS214098GB | hrzn-hosting Horizon Hosting Limited | 512 | 3 | 5 |
| AS59803GB | cceip DATAQUEST (HEATHROW) LIMITED | 512 | — | 1 |
| AS198071GB | BERCHSOLUTIONS-AS Berch Solutions Limited | 512 | 16 | 3 |
| AS57483GB | ICHILTON Ian Chilton | 512 | 14 | 16 |
| AS211760GB | CCL-LDN Cleveland Clinic London Ltd | 512 | — | 2 |
| AS200682GB | TLC-ASN Trustees of the London Clinic Limited | 512 | — | 2 |
| AS213534GB | GardnersBooks Gardners Books Ltd | 512 | — | 2 |
| AS60898GB | AQUIS-EXCHANGE Aquis Exchange Limited | 512 | — | 2 |
| AS219335GB | COREVANCE-AS COREVANCE LTD | 512 | — | 2 |
| AS214056GB | FUTURETECH Future Technology Group Ltd | 512 | — | 2 |
| AS50632GB | NU-COLO-NET Fish.Net Limited | 512 | — | 1 |
| AS205177GB | IVANTI-UK IVANTI UK LIMITED | 512 | — | 1 |
| AS197407GB | CUCE CHINA UNICOM (EUROPE) OPERATIONS LIMITED | 512 | — | 2 |
| AS51222GB | CMC-MARKETS-PLC CMC MARKETS PLC | 512 | — | 2 |