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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 |
| AS15992GB | VISA-EUROPE Visa Europe Limited | 256 | — | 1 |
| AS208590GB | AVE-AS Lasagna Ltd | 256 | 65.5K | 2 |
| AS205492GB | SCHRODERS-ZUR-AS Schroder Investment Management Limited | 256 | — | 1 |
| AS218280GB | HILDREY-NET Stephen Hildrey | 256 | 1 | 2 |
| AS204340GB | IQVIA-Germany IQVIA LTD. | 256 | — | 1 |
| AS16238GB | TELECOM2-AS Telecom2 Ltd. | 256 | — | 1 |
| AS215636GB | NUSO-FRA NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS49882GB | SKRILL Paysafe Holdings UK Limited | 256 | — | 1 |
| AS206530GB | VOXYONDER VOXYONDER NETWORK SERVICES UK LTD | 256 | — | 1 |
| AS42465GB | FORCEPOINT-ANYCAST-AS Forcepoint UK Limited | 256 | — | 1 |
| AS218974GB | UFO-TECHNOLOGIES-LIMITED UFO TECHNOLOGIES LIMITED | 256 | — | 1 |
| AS60890GB | CENTRALNIC-ANYCAST-B CentralNic Ltd | 256 | 1 | 2 |
| AS43236GB | BLUECREST-AS Bluecrest Capital Management LLP | 256 | — | 1 |
| AS200708GB | PROTEUS-AS Hugo Rodrigues Da Costa | 256 | 1 | 2 |
| AS48460GB | GREENCO-DR ServerHouse Ltd | 256 | — | 1 |
| AS49781GB | b4rk Broadband for Rural Kent Ltd | 256 | — | 1 |
| AS219172GB | VUNIFY VUNIFY LTD | 256 | — | 1 |
| AS206664GB | FlextradeUK-2 FLEXTRADE UK LIMITED | 256 | — | 1 |
| AS211118GB | SERMODK WORLDONE RESEARCH LIMITED | 256 | — | 1 |
| AS210440GB | Akaere-NetWork AKAERE NETWORKS TECHNOLOGY LTD | 256 | — | 1 |
| AS216265GB | ARISTO-NET ARISTO NETWORKS LTD | 256 | 1 | 2 |
| AS207089GB | uk-itsystems IT Systems & Support Limited | 256 | 524.3K | 2 |
| AS208665GB | TELEKLINE-AS Gareth Pulham | 256 | 2 | 3 |
| AS198375GB | DELUSION-NET Delusion Limited | 256 | 1 | 2 |
| AS42479GB | KWW-UK-AS KLDiscovery Limited | 256 | — | 1 |
| AS219414GB | Taylor-Wimpey Taylor Wimpey PLC | 256 | — | 1 |
| AS218462GB | NOTBADHOSTING NOTBAD HOSTING LTD | 256 | — | 1 |
| AS47791GB | EA-FI-HELSINKI Electronic Arts Limited | 256 | — | 1 |
| AS209750GB | MBX-AS MBX DIGITAL LIMITED | 256 | — | 1 |
| AS207273GB | PHAROAH-AS Pharoah Tools Limited | 256 | — | 1 |
| AS213525GB | McLarenApplied Motion Applied Limited | 256 | 1 | 2 |
| AS219032GB | PapilioHost Papilio Host Ltd | 256 | 1 | 2 |
| AS214284GB | OTTCLUB-AS INTERNET MEDIA STREAM LTD | 256 | — | 1 |
| AS42044GB | CENTRALNIC CentralNic Ltd | 256 | 1 | 2 |
| AS48632GB | BTS-HOLDINGS-PLC BTS HOLDINGS PLC | 256 | — | 1 |
| AS210025GB | XXSL Alice Cat Research Ltd | 256 | 10 | 11 |
| AS200416GB | BG-MED Genius Sports UK Limited | 256 | 65.5K | 2 |
| AS211374GB | McLarenApplied Motion Applied Limited | 256 | 1 | 2 |
| AS62112GB | XCONNECT-NL XConnect Services Limited | 256 | — | 1 |
| AS212788GB | edgenet Edge Network Technologies Ltd | 256 | — | 1 |
| AS214214GB | Threadneedle_MNT Threadneedle Asset Management Holdings Ltd | 256 | — | 1 |
| AS212446GB | caciltd CACI Ltd | 256 | — | 1 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |
| AS29019GB | MORNINGSTAR-EUROPE Morningstar Europe Limited | 256 | — | 1 |
| AS211339GB | VORTIA Vortia Ltd | 256 | — | 1 |
| AS59660GB | DATAART-RDC DataArt Technologies UK Ltd | 256 | — | 1 |