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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 | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
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| 0 |
| AS199349GB | SphereDent-AS SphereDent LTD | — | — | 0 |
| AS20859GB | NOMURA-AS Nomura International Plc | — | — | 0 |
| AS6847GB | VODAFONE-VONE-C VODAFONE ENTERPRISE EQUIPMENT LIMITED | — | — | 0 |
| AS35375GB | CONSENSUSONE BITNIFTY LTD | — | — | 0 |
| AS8457GB | INDEXSCOPE LIMITED | — | — | 0 |
| AS2529GB | DEMON-INTERNET - IDDQD-AS | — | — | 0 |
| AS49738GB | NETROX-AS 3nt solutions LLP | — | — | 0 |
| AS198219GB | CHARLIE-AS Charlie Camilleri | 256 | 10 | 4 |
| AS43236GB | BLUECREST-AS Bluecrest Capital Management LLP | 256 | — | 1 |
| AS198628GB | FIDESSA-AS FIDESSA TRADING UK LIMITED | 256 | — | 1 |
| AS212733GB | Netquirk Netquirk Limited | 256 | — | 1 |
| AS41493GB | CHI-X Cboe Europe Limited | 256 | — | 1 |
| AS47988GB | PHOTOSOFPICKLES Charles Allom | 256 | 1 | 2 |
| AS43851GB | LWBNET Etheroute Ltd | 256 | 1 | 2 |
| AS57850GB | NWL-AS Northumbrian Water Ltd | 256 | — | 1 |
| AS44268GB | JCB-AS J.C. BAMFORD EXCAVATORS LIMITED | 256 | — | 1 |
| AS215003GB | TUBES_AS Internet Tubes LTD | 256 | — | 1 |
| AS31632GB | OAG-AS OAG Aviation WorldWide Limited | 256 | — | 1 |
| AS50108GB | EA-UK-BIR Electronic Arts Limited | 256 | — | 1 |
| AS211175GB | gigapeak Caudata Ltd | 256 | 524.3K | 2 |
| AS200027GB | RDA-TELECOM RDA GROUP LIMITED | 256 | 1 | 2 |
| AS200950GB | CalibourNetwork Calibour Limited | 256 | 817 | 8 |
| AS51005GB | FOURDINTERACTIVE 4D Interactive Ltd | 256 | — | 1 |
| AS200280GB | CameronSharp Cameron Sharp | 256 | 1 | 2 |
| AS49209GB | CTE-ASN China Telecom Europe Ltd. | 256 | — | 1 |
| AS60079GB | EMF-AS Electromagnetic Field Ltd. | 256 | 1 | 2 |
| AS58062GB | StarNetwork w1n ltd | 256 | — | 1 |
| AS58007GB | Witine Witine Limited | 256 | — | 1 |
| AS214947GB | KAWEB Kaweb Limited | 256 | 524.3K | 2 |
| AS51953GB | sciencegroup-uk Sagentia Ltd | 256 | — | 1 |
| AS209669GB | PRIMONET-AS Ashley Primo | 256 | 3 | 4 |
| AS215959GB | NUSOUKMAN NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS47791GB | EA-FI-HELSINKI Electronic Arts Limited | 256 | — | 1 |
| AS202359GB | glauca-carrier AS207960 Cyfyngedig | 256 | 5 | 6 |
| AS205011GB | celertechuk Celer Technologies Limited | 256 | — | 1 |
| AS199165GB | SHIBBOLEET-AS Shibboleet Ltd | 256 | 1 | 2 |
| AS198375GB | DELUSION-NET Delusion Limited | 256 | 1 | 2 |
| AS207080GB | Basil-Fillan Jack Fillan | 256 | 65.5K | 2 |
| AS203094GB | ORG-CCL119-RIPE COMMUNITY CABLE LTD | 256 | — | 1 |
| AS57138GB | DOH-MULLVAD LOCIX LIMITED | 256 | 65.5K | 2 |
| AS56365GB | CME-AS-LD4-2 CME Operations Limited | 256 | — | 1 |
| AS214314GB | CUSHWAKE-UK2 Cushman & Wakefield Debenham Tie Leung Limited | 256 | — | 1 |
| AS59809GB | AS21IN Numeric Futures Limited | 256 | — | 1 |
| AS198222GB | WHC-AS West Herts College | 256 | — | 1 |
| AS197104GB | GENTOO-AS Gentoo Group Limited | 256 | — | 1 |
| AS209734GB | STARFALL STARFALL DISTRIBUTION LTD | 256 | — | 1 |