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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.
3,143 autonomous systems registered to United Kingdom. Click an AS for detail.
| 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 |
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| AS215600GB | KTTCARRIER KTT Europe Limited | — | 65.5K | 1 |
| AS219441GB | NEKONODE NEKONODE LTD | — | 2 | 2 |
| AS206202GB | NAMESERVERPARTY-AS Faelix Limited | — | 1 | 1 |
| AS57114GB | DEDISHACK Dedishack Ltd | — | — | 0 |
| AS213509GB | ARESHOSTING ARES HOSTING LIMITED | — | — | 0 |
| AS212885GB | UK-NATWEST-AS212885 Natwest Markets PLC | — | — | 0 |
| AS218671GB | WALKOWSKI-AS Lukasz Walkowski | — | 1 | 1 |
| AS60759GB | IAASRUN-EMEA-AS Netsapiens International Limited | — | — | 0 |
| AS47326GB | KTT-CARRIER-ASN KTT Carrier Limited | — | 65.6K | 3 |
| AS206509GB | KCOM-UK-AS KCOM Group Limited | — | — | 0 |
| AS215499GB | richard-franks Richard Franks | — | 1 | 1 |
| AS206136GB | CLOUDSRV-NORTH Clouvider Limited | — | — | 0 |
| AS44874GB | VORBOSS-RD Vorboss Limited | — | — | 0 |
| AS210090GB | PIPER-AS Zack Piper | — | — | 0 |
| AS198358GB | KAT Katherine Levi | — | 513 | 3 |
| AS60677GB | DLG DL Insurance Services Limited | — | — | 0 |
| AS59566GB | LogicForge LogicForge Limited | — | 8.2K | 1 |
| AS21356GB | XchangePointMLP GTT - EMEA Ltd. | — | — | 0 |
| AS29009GB | UKBROADBAND-AS UK Broadband Ltd. | — | — | 0 |
| AS28816GB | CHESS-ICT-MAN Chess ICT Ltd | — | — | 0 |
| AS57014GB | metroswitch 4on LTD | — | — | 0 |
| AS210533GB | xfour Benjamin Lewis | — | — | 0 |
| AS200365GB | Possibly-Lizards Possibly Lizards Limited | — | 257 | 2 |
| AS35662GB | IOMARTHOSTING Iomart Managed Services Limited | — | — | 0 |
| AS25307GB | Equinix-Metro-Z EQUINIX (SERVICES) LIMITED | — | — | 0 |
| AS30746GB | NAT-MORRIS Nat Morris | — | — | 0 |
| AS205292GB | NOMURA-NET2-AS2 Nomura International Plc | — | — | 0 |
| AS205006GB | hollandandbarrett Holland & Barrett International Limited | — | — | 0 |
| AS203164GB | Traveljigsaw-Ltd Booking.com Transport Limited | — | — | 0 |
| AS50773GB | ASN-Anana16 Sabio Ltd. | — | — | 0 |
| AS213897GB | BUBBLES-AS BUBBLES ALTER LIMITED | — | 1 | 1 |
| AS6859GB | KCP-AS DIGITAL CONTINUITY LIMITED | — | — | 0 |
| AS214592GB | GLADELIGHT Gladelight Limited | — | 17 | 2 |
| AS401583GB | COMBEST - Combest Peak Properties, LLC | — | — | 0 |
| AS205909GB | Phystrax-Network Phystrax Ltd | — | 64 | 1 |
| AS218319GB | ZETCH-MNT Zetch Ltd | — | — | 0 |
| AS199534GB | INTERFIBER-CI Interfiber Ltd | — | — | 0 |
| AS199210GB | EY-DE-NGDC-1 EY Global Services Limited | — | — | 0 |
| AS218212GB | GuernseyOnline Hosting Ltd. | — | 1 | 1 |
| AS213756GB | MACARNE Macarne Limited | — | — | 0 |
| AS48961GB | WarwickNet Glide Student & Residential Limited | — | 65.5K | 1 |
| AS42761GB | BRINKS Brinks Global Services Ltd | — | — | 0 |
| AS20517GB | ASN-TSC1 THE STREAMING COMPANY.COM LIMITED | — | — | 0 |
| AS39192GB | JackNet John Hadrill | — | — | 0 |
| AS24669GB | CLOUVIDER-NETWORK-OPTIMISATION Clouvider Limited | — | — | 0 |
| AS214811GB | BetInvest-AS Bet Invest LTD | — | — | 0 |