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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.
3,123 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications PLC | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 168 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 340 |
| AS212238GB | CDNEXT Datacamp Limited | 1M | 4,127 |
| 512 |
| — |
| 2 |
| AS30909GB | FASTVISION Fastvision Limited | 512 | — | 2 |
| AS211760GB | CCL-LDN Cleveland Clinic London Ltd | 512 | — | 2 |
| AS34623GB | Netegral Astutium Limited | 512 | 1 | 2 |
| AS198142GB | Warrington-AS Warrington Borough Council | 512 | — | 2 |
| AS43669GB | ACSL2 Axia Computer Systems Limited | 512 | — | 2 |
| AS212469GB | GREENCO-ISP ServerHouse Ltd | 512 | — | 1 |
| AS207173GB | uk_northrop Northrop Grumman UK Limited | 512 | — | 2 |
| AS200682GB | TLC-ASN Trustees of the London Clinic Limited | 512 | — | 2 |
| AS214098GB | hrzn-hosting Horizon Hosting Limited | 512 | 3 | 5 |
| AS203251GB | AlchemySystems Alchemy Systems International Limited | 512 | — | 1 |
| AS59619GB | Blackpool-AS Blackpool Borough Council | 512 | — | 2 |
| AS9090GB | PRNE PR Newswire Europe Ltd. | 512 | — | 2 |
| AS213493GB | NYRU NYRU Services Limited | 512 | — | 2 |
| AS211189GB | ThermoFisher_EU Thermo Electron Ltd | 512 | — | 1 |
| AS207900GB | uk_northrop_2 Northrop Grumman UK Limited | 512 | — | 2 |
| AS199262GB | TfL-FPS-AS Transport for London | 512 | — | 1 |
| AS201497GB | express-as STAT EXPRESS SERVICES LTD | 512 | — | 1 |
| AS204921GB | YunZheng-Network zhenyun sun | 512 | 27 | 14 |
| AS199285GB | CONARX Conarx, Ltd | 512 | 2 | 4 |
| AS197342GB | Aepona-BFS PERSISTENT SYSTEMS UK LIMITED | 512 | — | 2 |
| AS34930GB | HAL LHR AIRPORTS LIMITED | 512 | — | 2 |
| AS198104GB | Bush-Broadband-Ltd Bush Broadband Limited | 512 | 524.3K | 3 |
| AS206166GB | SCHRODERS-UK-AS Schroder Investment Management Limited | 512 | — | 2 |
| AS60654GB | METD-AS Metdesk Ltd | 512 | — | 2 |
| AS209735GB | LAGRANGE Lagrange Cloud Technologies Limited | 512 | 2 | 4 |
| AS51823GB | MTNETWORKSLTD Microtalk Europe Ltd | 512 | — | 2 |
| AS60688GB | CSPCORE CSP Partnership | 512 | — | 1 |
| AS210415GB | ASVNK00056 LOBOS NETWORKING LTD | 512 | — | 2 |
| AS30769GB | BERKELEY-AS The Berkeley Group plc | 512 | — | 1 |
| AS213482GB | WATERFALL Waterfall Technologies Ltd | 512 | 112 | 9 |
| AS39592GB | IGX0-AS Benjamin Ashton | 512 | — | 2 |
| AS50632GB | NU-COLO-NET Fish.Net Limited | 512 | — | 1 |
| AS49958GB | EVO-AS Evolution Gaming LTD | 512 | — | 2 |
| AS215854GB | DC-3-PROJECT Exponential-E Ltd. | 512 | — | 2 |
| AS204550GB | continental-ltd Continental Limited | 512 | 65.5K | 3 |
| AS61093GB | SC Solution Computers Ltd | 512 | — | 2 |
| AS41367GB | PSN-AS Wood Group UK Limited | 512 | — | 2 |
| AS211020GB | asrokatansky LOBOS NETWORKING LTD | 512 | — | 2 |
| AS213905GB | ISPLABS ISPLABS LIMITED | 512 | 3 | 5 |
| AS59920GB | LUSORY Lusory Limited | 512 | 4.1K | 3 |
| AS41751GB | OCADO OCADO RETAIL LIMITED | 512 | — | 1 |
| AS216274GB | uk-gigaloch Gigaloch Limited | 512 | 262.1K | 3 |
| AS43259GB | LEIDOS-UK Leidos Innovations UK LTD | 512 | — | 2 |
| AS51222GB | CMC-MARKETS-PLC CMC MARKETS PLC | 512 | — | 2 |
| AS212797GB | UK-PERFORMCONTENT Perform Content Services Limited | 512 | — | 1 |
| AS56644GB | SYNFS-AS Fundtech Financial Messaging Ltd | 512 | — | 2 |