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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.
| AS | Holder | IPv4 | Prefixes |
|---|---|---|---|
| AS5089GB | NTL Virgin Media Limited | 23M | 289 |
| AS2856GB | BT-UK-AS British Telecommunications Limited | 18.4M | 543 |
| AS13285GB | OPALTELECOM-AS TalkTalk Communications Limited | 7.7M | 99 |
| AS786GB | JANET - Jisc Services Limited | 7M | 219 |
| AS5607GB | BSKYB-BROADBAND-AS Sky UK Limited | 6.4M | 79 |
| 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 |
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.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS206483GB | REDMATTER Red Matter Limited | 768 | — | 3 |
| AS202901GB | NETCALL Netcall Technology Limited | 768 | — | 3 |
| AS204193GB | Pragma Gamma Telecom Holdings Ltd | 768 | — | 3 |
| AS15490GB | SHANEMCC Shane Mc Cormack | 768 | 524.3K | 3 |
| AS8336GB | InnovationGrpEMEA THE INNOVATION GROUP (EMEA) LTD | 768 | — | 3 |
| AS202787GB | withers-global Withers LLP | 768 | — | 3 |
| AS59907GB | IMSHealth IQVIA SOLUTIONS HQ LTD | 768 | — | 3 |
| AS210203GB | RETN-IT-AS RETN Limited | 512 | — | 1 |
| AS39592GB | IGX0-AS Benjamin Ashton | 512 | — | 2 |
| AS205177GB | IVANTI-UK IVANTI UK LIMITED | 512 | — | 1 |
| AS34623GB | Netegral Astutium Limited | 512 | 1 | 2 |
| AS213534GB | GardnersBooks Gardners Books Ltd | 512 | — | 2 |
| AS214347GB | MDTS-LTD Massive Dynamic Technical Services Limited | 512 | 1 | 3 |
| AS58102GB | TWODMEDIA 2Dmedia Ltd. | 512 | 1 | 2 |
| AS203251GB | AlchemySystems Alchemy Systems International Limited | 512 | — | 1 |
| AS50287GB | AudatexUK Audatex (UK) Ltd | 512 | 16 | 3 |
| AS201301GB | soundmouse-netwise Soundmouse Ltd | 512 | 131.1K | 4 |
| AS9090GB | PRNE PR Newswire Europe Ltd. | 512 | — | 2 |
| AS50632GB | NU-COLO-NET Fish.Net Limited | 512 | — | 1 |
| AS207520GB | EXODUSPOINT-CAPITAL-MANAGEMENT-UK ExodusPoint Capital Management UK, LLP | 512 | — | 2 |
| AS216026GB | Smart-Technology-Advisers Smart Technology Advisers Ltd | 512 | — | 2 |
| AS199720GB | icbcs ICBC Standard Bank PLC | 512 | — | 2 |
| AS42635GB | AS-RCKR CARDOCK HOSTING LIMITED | 512 | — | 2 |
| AS199285GB | CONARX Conarx, Ltd | 512 | 2 | 4 |
| AS202310GB | hyve-corp Hyve Ltd | 512 | 2 | 2 |
| AS49313GB | SEVAHOST-AS Seva-Host Ltd | 512 | — | 2 |
| AS211501GB | HIGHTIDEGROUP-AS High Tide Group Limited | 512 | 524.3K | 4 |
| AS214722GB | LHGE Lighthouse Global Europe Limited | 512 | — | 2 |
| AS50656GB | Optix-Software-ASN Optix Software Ltd | 512 | — | 2 |
| AS205359GB | precisely-ltd Precisely Software Ltd | 512 | — | 2 |
| AS206332GB | ARROW Arrow Business Communications Limited | 512 | 65.5K | 3 |
| AS34930GB | HAL LHR AIRPORTS LIMITED | 512 | — | 2 |
| AS198142GB | Warrington-AS Warrington Borough Council | 512 | — | 2 |
| AS213549GB | SATISFYHOST SATISFYHOST LTD | 512 | 3 | 5 |
| AS206136GB | CLOUDSRV-NORTH Clouvider Limited | 512 | — | 2 |
| AS5586GB | MCI-INT Verizon UK Limited | 512 | 32 | 3 |
| AS208026GB | LITTLEWOODS LITTLEWOODS LTD | 512 | — | 2 |
| AS41367GB | PSN-AS Wood Group UK Limited | 512 | — | 2 |
| AS60898GB | AQUIS-EXCHANGE Aquis Exchange Limited | 512 | — | 2 |
| AS50078GB | X-ON X-ON HEALTH LIMITED | 512 | — | 2 |
| AS199794GB | EMO-AS EMOCLOUD LTD | 512 | 784 | 6 |
| AS57483GB | ICHILTON Ian Chilton | 512 | 14 | 16 |
| AS60654GB | METD-AS Metdesk Ltd | 512 | — | 2 |
| AS211760GB | CCL-LDN Cleveland Clinic London Ltd | 512 | — | 2 |
| AS209735GB | LAGRANGE Lagrange Cloud Technologies Limited | 512 | 2 | 4 |
| AS51823GB | MTNETWORKSLTD Microtalk Europe Ltd | 512 | — | 2 |
| AS218774GB | UC-AS uno Ltd. | 512 | — | 1 |
| AS41751GB | OCADO OCADO RETAIL LIMITED | 512 | — | 1 |
| AS213287GB | Pure-IP-Europe-BV Pure IP Limited | 512 | — | 1 |
| AS48682GB | IPSL IP Space Limited | 512 | — | 2 |