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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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| AS61126GB | ROUTED Lee Valentine | — | 3 | 3 |
| AS200994GB | CLUB-AS-001 BNW TECHNOLOGY LTD | — | — | 0 |
| AS215768GB | Infected-Systems Alex Haydock | — | 1 | 1 |
| AS51490GB | PROPER-AS Proper Support LLP | — | — | 0 |
| AS205474GB | CARR Jack Carr | — | 1 | 1 |
| AS57927GB | UK-KECONNECT Digital Space Group Limited | — | — | 0 |
| AS203766GB | AWILLS Andrew Wills | — | 1 | 1 |
| AS49819GB | SHOPZILLAEU Skimbit Ltd | — | — | 0 |
| AS210961GB | SIGN4 Nathan York | — | 1 | 1 |
| AS200499GB | EHL-AS Enterprises Holding LTD | — | 1 | 1 |
| AS199804GB | TFES-AS THE FIRST EAST STAR LTD | — | 1 | 1 |
| AS214295GB | SKYNET SKYNET NETWORK LTD | — | — | 0 |
| AS41255GB | Alanyhq-Networks-AS Alanyhq Networks Limited | — | 1 | 1 |
| AS34406GB | VANCO-UK-AS2 Flag Telecom UK Limited | — | — | 0 |
| AS205383GB | PERRYNET Rhys Perry | — | 1 | 1 |
| AS8716GB | ASINCORE Redcentric Solutions Ltd | — | — | 0 |
| AS48961GB | WarwickNet Glide Student & Residential Limited | — | 65.5K | 1 |
| AS6656GB | STARINTERNET Claranet Limited | — | — | 0 |
| AS210683GB | syo Syo.io Limited | — | 1 | 1 |
| AS207663GB | PARKIN Paul Parkin | — | — | 0 |
| AS197239GB | ClearNet HYPERLXC MEDICAL LTD | — | 1 | 1 |
| AS199686GB | aaroncarson Aaron Carson | — | 1 | 1 |
| AS49134GB | AS_10VPN 10VPN Research Network LTD | — | 22 | 4 |
| AS215913GB | NetLab Chun Ming Ou | — | — | 0 |
| AS199688GB | CRITPERF-AS Critical Perfect Ltd | — | 16 | 1 |
| AS214834GB | Rekade-Networks LASTRESPONSE LTD | — | — | 0 |
| AS215600GB | KTTCARRIER KTT Europe Limited | — | 65.5K | 1 |
| AS213673GB | WAISE-AS WAISE EUROPE LTD | — | 320 | 5 |
| AS214514GB | HENRYCLARKE Henry Clarke | — | 16 | 1 |
| AS212426GB | FWNETWORKS-AS Hey Broadband LTD | — | — | 0 |
| AS198174GB | VEAN-AS Vean Networks Ltd | — | 1 | 1 |
| AS2529GB | DEMON-INTERNET - IDDQD-AS | — | — | 0 |
| AS198768GB | OASISINFO-AS OASIS INFOTECH LIMITED | — | 2 | 2 |
| AS213660GB | elisamurphy Elisa Murphy | — | — | 0 |
| AS216157GB | SIXNET-OP Sixnet Operation Ltd | — | 65.5K | 1 |
| AS212931GB | OSCARMUSICRAND Oscar Music & Media Ltd. | — | — | 0 |
| AS214592GB | GLADELIGHT Gladelight Limited | — | 17 | 2 |
| AS201164GB | Cool-Studio Cool Studio Limited | — | — | 0 |
| AS201824GB | stat-cons-as STAT CONSULTING LTD | — | 1 | 1 |
| AS201696GB | SHAMILNET Shamil Nunhuck | — | — | 0 |
| AS206202GB | NAMESERVERPARTY-AS Faelix Limited | — | 1 | 1 |
| AS197595GB | SEEKAHOST-TECH SEEKAHOST TECHNOLOGIES LTD | — | — | 0 |
| AS215332GB | SNIFF122-AS Lewis Foster | — | 1 | 1 |
| AS205649GB | TOSLER-NET Shaun Tosler | — | 1 | 1 |
| AS202525GB | CHUNMING-AS Chun Ming Ou | — | 3 | 3 |
| AS47561GB | AS4 EDGENAP LTD | — | — | 0 |