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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 | 4,120 |
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| 0 |
| AS198299GB | Kooljett-AS Kooljett Limited | — | — | 0 |
| AS39295GB | SWIP-AS Southern Communications Ltd | — | — | 0 |
| AS209149GB | SEEKAHOST SEEKAHOST LTD | — | — | 0 |
| AS199172GB | FAST-BITS-AS Fast Bits Limited | — | — | 0 |
| AS60012GB | GDSV vXtream Ltd | — | — | 0 |
| AS59705GB | POBOX2-AS Acora Limited | — | — | 0 |
| AS8548GB | AS8548 Jisc Services Limited | — | — | 0 |
| AS50534GB | VMO2 Virgin Media Limited | — | — | 0 |
| AS213696GB | INTERNETBACKBONE-AS Internet Backbone LTD | — | — | 0 |
| AS216217GB | baltic Baltic Networks Limited | — | — | 0 |
| AS215323GB | SGM SGM STUDIOS LTD | — | — | 0 |
| AS201690GB | CallWithMe-AS CALLWITHME LTD. | — | — | 0 |
| AS31270GB | FMN GCI Network Solutions Limited | — | — | 0 |
| AS25346GB | Tiscali-AS TalkTalk Communications Limited | — | — | 0 |
| AS208680GB | LONIX-LTD London IX Limited | — | — | 0 |
| AS24670GB | COHTECH01-AS Coherent Technology Solutions Limited | — | — | 0 |
| AS215471GB | INTERNETTYUK-MDU Internetty Ltd | — | — | 0 |
| AS12554GB | EASYNET-BE GTT - EMEA Ltd. | — | — | 0 |
| AS209417GB | TIANHAI-EU Tianhai Infotech Ltd | — | — | 0 |
| AS201762GB | RBK-AS Royal Borough of Kingston Council | — | — | 0 |
| AS201696GB | SHAMILNET Shamil Nunhuck | — | — | 0 |
| AS198372GB | wowfi-as Futility Ltd | — | — | 0 |
| AS212885GB | UK-NATWEST-AS212885 Natwest Markets PLC | — | — | 0 |
| AS41255GB | Alanyhq-Networks-AS Alanyhq Networks Limited | — | 1 | 1 |
| AS198653GB | SOLARAPPS-AS SOLARAPPS LTD | — | — | 0 |
| AS62273GB | IXMIDLANDS-ROUTESRV SRVNET LTD | — | — | 0 |
| AS197872GB | EA-NL-AMSTERDAM_DC Electronic Arts Limited | — | — | 0 |
| AS47762GB | westcloud-AS CCPRO Solutions Limited | — | — | 0 |
| AS44981GB | Oosha Oosha Ltd | — | — | 0 |
| AS39179GB | NASSTAR-TRANSIT-AS GCI Network Solutions Limited | — | — | 0 |
| AS51805GB | cantab Gam Systematic LLP | — | — | 0 |
| AS214602GB | DATACENTER-CLUSTER-FL-AS FIRST SERVER LIMITED | — | 65.5K | 1 |
| AS202818GB | Level3Communications Lumen Technologies UK Limited | — | — | 0 |
| AS5519GB | Wavenet-AS5519 Wavenet Limited | — | — | 0 |
| AS8576GB | CW-ASPAC Vodafone Limited | — | — | 0 |
| AS215587GB | STELIAIX Stelia Ltd | — | — | 0 |
| AS215086GB | BONZI Alfred Foster | — | — | 0 |
| AS214519GB | b2c2 B2C2 Ltd. | — | — | 0 |
| AS45828GB | WORLDREACH Hello World Ltd | — | — | 0 |
| AS207890GB | Intefluent Andrew Williams | — | 17 | 2 |
| AS211986GB | Athlok-BGP-Collector Athlok Ltd | — | — | 0 |
| AS203109GB | ORG-AL1060-RIPE AeroFibre Ltd | — | — | 0 |
| AS211209GB | EUROPEANEDGE-IX AIRBYTES COMMUNICATIONS Limited | — | — | 0 |
| AS206895GB | PRIMONET-RESEARCH-AS Ashley Primo | — | — | 0 |
| AS206745GB | Shawdex Shawdex Ltd | — | — | 0 |
| AS205328GB | spirit The Spiritual Agency, private company limited by guarantee | — | — | 0 |