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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 |
| — |
| 256 |
| 1 |
| AS64474GB | ASN-IITSS IT Support Services Team Limited | — | 3 | 3 |
| AS218671GB | WALKOWSKI-AS Lukasz Walkowski | — | 1 | 1 |
| AS206877GB | SharedGrid SharedGrid Ltd | — | 1 | 1 |
| AS214931GB | ALUE-NET ALUE LTD | — | 1 | 1 |
| AS201616GB | theoh-as Theo Holroyd | — | 2 | 2 |
| AS200927GB | ProxyOmega ProxyOmega LTD | — | 65.5K | 1 |
| AS29478GB | JUNESTA Karl Dyson | — | 2 | 2 |
| AS206000GB | HRE Harry Rowan Elenor | — | 259 | 4 |
| AS200671GB | START-AS START BUILDING LTD | — | 1 | 1 |
| AS209022GB | Tschajera-Limited Tschajera Limited | — | 4.1K | 16 |
| AS207965GB | ETIENNE-LABAUME ETIENNE LABAUME | — | 13 | 3 |
| AS202776GB | Moeclub MOECLUB LTD | — | 9 | 9 |
| AS213982GB | DISTRICTB-AS Callum Bennett | — | 17 | 2 |
| AS209364GB | OME-LOGIC-AS Ome Logic Ltd | — | — | 0 |
| AS214749GB | PAW James Cahill | — | 6 | 6 |
| AS210338GB | PIXSAL-AS Kieran Breeze | — | 3 | 3 |
| AS25085GB | ALUE-NET ALUE LTD | — | 12 | 12 |
| AS215619GB | RCD-AS RED COKE DEVELOPMENT LTD | — | 4 | 4 |
| AS215158GB | SIXNET-OP2 Sixnet Operation Ltd | — | 65.5K | 1 |
| AS200754GB | SHADOWRHYTHM-AS SHADOWRHYTHM LIMITED | — | 3 | 3 |
| AS218602GB | SMARTYHOME Martyn Axon | — | 1 | 1 |
| AS215159GB | RokosServicesUK Rokos Services (UK) Limited | — | — | 0 |
| AS47509GB | WT70-AS Wai-Wah Tang | — | 28 | 16 |
| AS210090GB | PIPER-AS Zack Piper | — | — | 0 |
| AS199534GB | INTERFIBER-CI Interfiber Ltd | — | — | 0 |
| AS49512GB | EVERMERE Evermere Capital Management Ltd | — | — | 0 |
| AS30746GB | NAT-MORRIS Nat Morris | — | — | 0 |
| AS17102GB | IIX-LABS - IX Reach Ltd | — | — | 0 |
| AS216254GB | GAZLEE Gary Lee | — | — | 0 |
| AS212222GB | CentralNic-Anycast-I CentralNic Ltd | — | — | 0 |
| AS205909GB | Phystrax-Network Phystrax Ltd | — | 64 | 1 |
| AS209808GB | LUKE Luke James | — | 64 | 1 |
| AS210683GB | syo Syo Limited | — | 1 | 1 |
| AS215363GB | Wles Wles Technologies Ltd | — | 257 | 2 |
| AS198741GB | AMELIAK Amelia Kalinowska | — | 1 | 1 |
| AS198768GB | OASISINFO-AS OASIS INFOTECH LIMITED | — | 2 | 2 |
| AS199804GB | TFES-AS THE FIRST EAST STAR LTD | — | 1 | 1 |
| AS218776GB | FULLFIBER FULLFIBER LTD | — | 7 | 7 |
| AS9786GB | XIANDOUCLOUD1-AS-AP - XIANDOUCLOUD INFORMATION TECHNOLOGY LTD | — | 1 | 1 |
| AS215600GB | KTTCARRIER KTT Europe Limited | — | 65.5K | 1 |
| AS219361GB | SHIKANOKO-NETWORKS SHIKANOKO NETWORKS LTD | — | 1 | 1 |
| AS204291GB | pinguin Thomas McLoughlin | — | 337 | 7 |
| AS198657GB | GOHEGAN-NET Kai Gohegan | — | 257 | 2 |
| AS214818GB | WILL-WILSON William Wilson | — | 9 | 5 |
| AS202235GB | CSD-COMMS UK On-line Agri-sales Limited | — | 65.5K | 1 |
| AS199686GB | aaroncarson Aaron Carson | — | 18 | 3 |