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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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| AS219441GB | NEKONODE NEKONODE LTD | — | 2 | 2 |
| AS218191GB | MOOREQUALITY-AS MOORE QUALITY ENGINEERING LTD | — | — | 0 |
| AS35196GB | IH-TRANSIT-AS FIRST SERVER LIMITED | — | 1 | 1 |
| AS218671GB | WALKOWSKI-AS Lukasz Walkowski | — | 1 | 1 |
| AS213092GB | marbleis Acrion International Limited | — | 28 | 13 |
| AS203056GB | TTBNGVS TalkTalk Communications Limited | — | — | 0 |
| AS209600GB | AS209600 Livefix Technical Solutions Group Limited | — | 32 | 2 |
| AS211386GB | LINX-ROUTE-SERV-AZURE London Internet Exchange Ltd. | — | — | 0 |
| AS47509GB | WT70-AS Wai-Wah Tang | — | 28 | 16 |
| AS203031GB | AKIX-RS AKAERE NETWORKS TECHNOLOGY LTD | — | — | 0 |
| AS200754GB | SHADOWRHYTHM-AS SHADOWRHYTHM LIMITED | — | 3 | 3 |
| AS202695GB | MODERN-UK Modern Networks Services Ltd | — | — | 0 |
| AS214749GB | PAW James Cahill | — | 6 | 6 |
| AS60912GB | VPLAB VPLAB LTD | — | — | 0 |
| AS207965GB | ETIENNE-LABAUME ETIENNE LABAUME | — | 13 | 3 |
| AS62016GB | PSN Virgin Media Limited | — | — | 0 |
| AS215368GB | CONNORMCF Connor McFarlane | — | 1 | 1 |
| AS50617GB | H3GUK Hutchison 3G UK Limited | — | — | 0 |
| AS218327GB | STRAIN-AS Jack Strain | — | 1 | 1 |
| AS201811GB | LAURINTAPP-AS LAURINTAPP LTD | — | — | 0 |
| AS200198GB | DSMTech DSM (GB) Limited | — | 16 | 1 |
| AS60977GB | NVIDIA-NGN NVIDIA Ltd | — | — | 0 |
| AS210338GB | PIXSAL-AS Kieran Breeze | — | 3 | 3 |
| AS20832GB | FUSE2 Southern Communications Ltd | — | — | 0 |
| AS211956GB | JOSH-ASN Joshua Powell | — | 4.1K | 1 |
| AS56979GB | fulcrum Fulcrum Data Systems Ltd | — | — | 0 |
| AS218776GB | FULLFIBER FULLFIBER LTD | — | 7 | 7 |
| AS51939GB | TerraMC Terra Management Consulting Ltd | — | 28 | 13 |
| AS200499GB | EHL-AS Enterprises Holding LTD | — | 1 | 1 |
| AS201258GB | CRYPTIDZ Chaos Cupit | — | — | 0 |
| AS202627GB | CARBONDNS Fika Studio Limited | — | 1 | 1 |
| AS15463GB | NETWORKI-AS Virtustream UK Ltd | — | — | 0 |
| AS200671GB | START-AS START BUILDING LTD | — | 1 | 1 |
| AS6675GB | COLT-FRANCE-AS COLT Technology Services Group Limited | — | — | 0 |
| AS204994GB | BAHAMUT-ZONE Luke Seabrook | — | 1 | 1 |
| AS5622GB | THOMSON-REUTERS Thomson Reuters (Professional) UK Ltd | — | — | 0 |
| AS210961GB | SIGN4 Nathan York | — | 1 | 1 |
| AS60759GB | IAASRUN-EMEA-AS Netsapiens International Limited | — | — | 0 |
| AS214602GB | DATACENTER-CLUSTER-FL-AS FIRST SERVER LIMITED | — | 65.5K | 1 |
| AS197040GB | DATAART-BEG DataArt Technologies UK Ltd | — | — | 0 |
| AS49134GB | AS_10VPN 10VPN Research Network LTD | — | 2 | 2 |
| AS57650GB | NOMIOS-ASN Nomios UK&I Limited | — | — | 0 |
| AS213729GB | RikkiNet Rikki Network Limited | — | 1 | 1 |
| AS203504GB | Tomas-Freitas-Fernandes Tomas Freitas Fernandes | — | 2 | 2 |
| AS218843GB | OMNIVISION-INTERNET-GATEWAY Omnivision Solutions Ltd | — | 339 | 9 |
| AS5600GB | TCPNET-AS BNW TECHNOLOGY LTD | — | — | 0 |