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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 | 299 |
| AS2856GB | BT-UK-AS British Telecommunications Limited | 18.5M | 555 |
| AS13285GB | OPALTELECOM-AS TalkTalk Communications Limited | 7.7M | 99 |
| AS786GB | JANET Jisc Services Limited | 7.2M | 222 |
| AS5607GB | BSKYB-BROADBAND-AS Sky UK Limited | 6.9M | 80 |
| 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 |
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.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS50826GB | Moelis-and-Company-UK-LLP Moelis & Company UK LLP | 1K | — | 1 |
| AS212413GB | DWP Department for Work and Pensions | 1K | — | 3 |
| AS34178GB | Qinetiq Qinetiq Limited | 1K | — | 4 |
| AS203449GB | HOPEWISER-MERLIN Hopewiser Ltd | 1K | 65.5K | 2 |
| AS201277GB | Eloquent-AS Eloquent Technologies Ltd | 1K | 524.3K | 2 |
| AS44052GB | PRESSCOMPUTER-ASN ICONIC MEDIA SYSTEMS LIMITED | 1K | — | 3 |
| AS203452GB | ImtechUK Swarco UK & Ireland Ltd | 1K | — | 1 |
| AS201664GB | netwarm NetWarm LTD | 1K | — | 4 |
| AS204264GB | PUREIP Pure IP Limited | 1K | — | 1 |
| AS209899GB | NUBIS zananet Limited | 1K | — | 1 |
| AS29164GB | IOMARTHOSTING-EU Iomart Group Plc | 1K | 65.5K | 5 |
| AS39610GB | LCH-CLEARNET LCH Group Holdings Limited | 1K | — | 3 |
| AS206324GB | STELLIUM-DC Stellium Networks Limited | 1K | 524.3K | 2 |
| AS214351GB | FEMOIT FEMO IT SOLUTIONS LIMITED | 1K | — | 4 |
| AS20577GB | TRADEWEB TRADEWEB EUROPE LIMITED | 1K | — | 4 |
| AS208833GB | MYCOMMS MyComms Ltd | 1K | — | 1 |
| AS208524GB | VITS-Hosting-Services VITS LIMITED | 1K | — | 1 |
| AS210087GB | ONTIX Ontix Sites No1 Limited | 1K | — | 1 |
| AS203573GB | tmcs Tailor Made Technologies Ltd | 1K | — | 1 |
| AS203582GB | mts M-Tech Systems Ltd | 1K | — | 1 |
| AS209447GB | RETN-TR-AS RETN Limited | 1K | — | 1 |
| AS207072GB | NIGSUN Nigsun Limited | 1K | 262.1K | 2 |
| AS56850GB | AKARI-AS Akari Networks Ltd | 1K | — | 1 |
| AS60851GB | EMIS-AS Egton Medical Information Systems Limited | 1K | — | 2 |
| AS202212GB | DWEBS-AS DWebs Ltd | 1K | 65.5K | 2 |
| AS206984GB | lypy Lypy Limited | 1K | 524.3K | 3 |
| AS205565GB | BASETELECOMMUNICATIONSLLP Base Telecommunications LLP | 1K | 524.3K | 2 |
| AS205804GB | DELTAV Delta V Technologies Limited | 1K | 65.5K | 10 |
| AS199569GB | Cognizant-EU-AS Cognizant Worldwide Limited | 1K | — | 2 |
| AS208330GB | ASBLX BLX Limited | 1K | — | 1 |
| AS208756GB | deas-001 ALCON TELECOM LTD | 1K | — | 3 |
| AS201289GB | ESENDEX COMMIFY UK LIMITED | 1K | — | 1 |
| AS197223GB | WEDROPCODE-AS WEDROPCODE LTD | 1K | — | 4 |
| AS202907GB | ATOMICIT Atomic IT Limited | 1K | 524.3K | 2 |
| AS12884GB | DRW-Investments-AS DRW Investments (UK) Limited | 1K | — | 4 |
| AS8669GB | TOTALWEBSOLUTIONS Total Web Solutions Ltd | 1K | — | 4 |
| AS35801GB | RE-SOURCES-AS LION RE: SOURCES UK LIMITED | 1K | — | 3 |
| AS58101GB | GLADSERV Gladserv Limited | 1K | 65.6K | 6 |
| AS200652GB | SIPHON Nuvias UC Limited | 1K | 524.3K | 2 |
| AS41281GB | KEFF KeFF Networks Ltd | 1K | 2 | 6 |
| AS206682GB | lima LIMA Networks Limited | 1K | — | 1 |
| AS205734GB | TRAPOC Copart UK Limited | 1K | — | 4 |
| AS33968GB | InternetEngineeringAS EASYSPACE LIMITED | 1K | — | 1 |
| AS205389GB | ZOOM-INTERNET Zoom Internet Ltd | 1K | 65.5K | 2 |
| AS204258GB | vive-technologies-ltd Vive Technologies Ltd | 1K | 524.3K | 2 |
| AS208408GB | KARANYI Karanyi Ltd | 1K | 4 | 8 |
| AS206062GB | SpaceDataCentres Space Data Centres Ltd | 1K | — | 1 |
| AS50468GB | CITRUS-AS CITRUS TELECOMMUNICATIONS LTD | 1K | — | 4 |
| AS35180GB | HIPCOM-AS Broadsoft LTD | 1K | 2 | 6 |
| AS213451GB | CILIXNET-AS Cilix Limited | 1K | 65.5K | 5 |