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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 |
| AS200468GB | ALVAREZ ALVAREZ & MARSAL DISPUTES AND INVESTIGATIONS LLP | 256 | — | 1 |
| AS203105GB | BlahajInternet Blahaj Internet Ltd | 256 | 1 | 2 |
| AS48686GB | SOLTECH-ASN oRe Networks Limited | 256 | 1 | 2 |
| AS200280GB | CameronSharp Cameron Sharp | 256 | 1 | 2 |
| AS57138GB | DOH-MULLVAD LOCIX LIMITED | 256 | 65.5K | 2 |
| AS218388GB | LODESTAR LODESTAR NETWORKS LTD | 256 | 1 | 2 |
| AS39459GB | PGL-AS Office Unlocked Limited | 256 | — | 1 |
| AS47426GB | ADVITEL-AS Advitel Ltd | 256 | 1 | 2 |
| AS218703GB | Tempest TEMPEST OPERATIONS UK LTD | 256 | — | 1 |
| AS213150GB | INDIGO-SYS Laurence White | 256 | 524.3K | 2 |
| AS213692GB | CSCM CSCM Limited | 256 | 524.3K | 2 |
| AS49978GB | IXARIS NIUM SYSTEMS UK LIMITED | 256 | — | 1 |
| AS60584GB | IN8INITY-AS IN8INITY GLOBAL LIMITED | 256 | — | 1 |
| AS198466GB | MORBY J. MORBY | 256 | — | 1 |
| AS198375GB | DELUSION-NET Delusion Limited | 256 | 1 | 2 |
| AS61283GB | MILLAR Andrew Millar Ltd | 256 | 1 | 2 |
| AS201323GB | host-media-ltd Host Media Ltd | 256 | 65.5K | 2 |
| AS215419GB | karizanta Karizanta LTD | 256 | 1 | 2 |
| AS215551GB | Sweden_Internet_Exchange KeFF Networks Ltd | 256 | — | 1 |
| AS47367GB | TORBAY-AS Torbay Economic Development Company Limited | 256 | — | 1 |
| AS204826GB | NR-EU-MA3 North Rock Capital Management (UK) LLP | 256 | — | 1 |
| AS199330GB | CENTRALNIC-ANYCAST-A CentralNic Ltd | 256 | 1 | 2 |
| AS207155GB | STORMNET Stormnet Hosting LTD | 256 | 1 | 2 |
| AS60698GB | LINXNETWORKS Linx-Networks-UK Ltd | 256 | — | 1 |
| AS211374GB | McLarenApplied Motion Applied Limited | 256 | 1 | 2 |
| AS198219GB | CHARLIE-AS Charlie Camilleri | 256 | 10 | 4 |
| AS204293GB | TinyHomeLab TinyHomeLab Ltd | 256 | 1 | 2 |
| AS201230GB | PENINSULA-AS Peninsula Business Services Ltd | 256 | — | 1 |
| AS201528GB | ORCHID-CELLMARK-CHORLEY Orchid Cellmark Ltd | 256 | — | 1 |
| AS213016GB | holker-network-solutions Holker Network Solutions Ltd | 256 | — | 1 |
| AS207925GB | SQUIRREL-HQ Squirrel Internet Ltd | 256 | 131.1K | 3 |
| AS218482GB | PSYCHOVPS PSYCHOVPS LTD | 256 | 16 | 2 |
| AS209297GB | AS-NICHI-YOROZUYA NICHI YOROZUYA LTD | 256 | 33 | 4 |
| AS210584GB | PwCITSCo PricewaterhouseCoopers IT Services Limited | 256 | — | 1 |
| AS197576GB | zumbak ZUMBAK LTD | 256 | — | 1 |
| AS218950GB | VYTAL VYTAL TECHNOLOGY LTD | 256 | — | 1 |
| AS219412GB | Oxiwave-Internet Lewis Brown | 256 | 70.3K | 26 |
| AS215527GB | XERONET Xero Networks LTD | 256 | 8 | 9 |
| AS204055GB | CentralNic-Anycast-H CentralNic Ltd | 256 | 1 | 2 |
| AS219172GB | VUNIFY VUNIFY LTD | 256 | — | 1 |
| AS42044GB | CENTRALNIC CentralNic Ltd | 256 | 1 | 2 |
| AS197685GB | ONIONRING Onionring Limited | 256 | — | 1 |
| AS212124GB | UPMIND Upmind Automation Limited | 256 | — | 1 |
| AS199716GB | Bletchley-Networks-Limited Bletchley Networks Limited | 256 | — | 1 |
| AS41553GB | Reed-Managed-Services Reed Specialist Recruitment Limited | 256 | — | 1 |
| AS219032GB | PapilioHost Papilio Host Ltd | 256 | 1 | 2 |