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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 | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 331 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
| 256 |
| — |
| 1 |
| AS212124GB | UPMIND Upmind Automation Limited | 256 | — | 1 |
| AS215636GB | NUSO-FRA NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS211118GB | SERMODK WORLDONE RESEARCH LIMITED | 256 | — | 1 |
| AS209635GB | RedMatter-Internal Red Matter Limited | 256 | 1 | 2 |
| AS43079GB | Matchtech MATCHTECH GROUP (UK) LIMITED | 256 | — | 1 |
| AS43059GB | iitss IT Support Services Team Limited | 256 | 1 | 2 |
| AS34611GB | Mystere Matthew Southgate | 256 | — | 1 |
| AS204979GB | LINX-SCO1 London Internet Exchange Ltd. | 256 | 1 | 2 |
| AS197685GB | ONIONRING Onionring Limited | 256 | — | 1 |
| AS200468GB | ALVAREZ ALVAREZ & MARSAL DISPUTES AND INVESTIGATIONS LLP | 256 | — | 1 |
| AS214188GB | VoltHosting VoltHosting Ltd | 256 | 256 | 2 |
| AS204089GB | ADML Apollo Duck Media Ltd | 256 | 524.3K | 2 |
| AS202665GB | SMSHW SMShighway Limited | 256 | — | 1 |
| AS50985GB | EA-UK-RUN Electronic Arts Limited | 256 | — | 1 |
| AS216036GB | TOTALCOMMS-AS Signal Telecom Ltd | 256 | — | 1 |
| AS202359GB | glauca-carrier AS207960 Cyfyngedig | 256 | 5 | 6 |
| AS209710GB | LUMINE-AS SNRD NETWORKS LIMITED | 256 | 359 | 12 |
| AS59809GB | AS21IN Numeric Futures Limited | 256 | — | 1 |
| AS207601GB | EA-FR-LYON Electronic Arts Limited | 256 | — | 1 |
| AS214295GB | SKYNET SKYNET NETWORK LTD | 256 | — | 1 |
| AS50391GB | DIVERGENT DIVERGENT NETWORKS LTD | 256 | 65.6K | 5 |
| AS213692GB | CSCM CSCM Limited | 256 | 524.3K | 2 |
| AS215303GB | Qubitbytes Qubitbytes LTD | 256 | — | 1 |
| AS60223GB | NETIFACE-AS Netiface Limited | 256 | — | 1 |
| AS199649GB | KTSTECH-AS KTS Technology Group Limited | 256 | 1 | 2 |
| AS202288GB | MM Matthew Martin | 256 | 1 | 2 |
| AS49606GB | MCDEU01 MCD Europe Limited | 256 | — | 1 |
| AS199738GB | VATORA VATORA LIMITED | 256 | 65.5K | 2 |
| AS199492GB | EASYINTERNET Easy Internet Solutions Limited | 256 | — | 1 |
| AS208098GB | GPS THREDD UK LIMITED | 256 | — | 1 |
| AS198063GB | DWIN-AS AWIN LTD | 256 | — | 1 |
| AS47426GB | ADVITEL-AS Advitel Ltd | 256 | 1 | 2 |
| AS38936GB | HMUK-AS Herman Miller LTD | 256 | — | 1 |
| AS39576GB | Prostack-Hosting Sharpstack Hosting Ltd | 256 | 1 | 2 |
| AS51392GB | FUSIONED Fusioned Ltd | 256 | 65.5K | 2 |
| AS197622GB | PARSELY-AS NEXTTRANSLATE LTD | 256 | — | 1 |
| AS209220GB | AblativeHosting Ablative Hosting Ltd | 256 | 1 | 2 |
| AS59660GB | DATAART-RDC DataArt Technologies UK Ltd | 256 | — | 1 |
| AS50108GB | EA-UK-BIR Electronic Arts Limited | 256 | — | 1 |
| AS215551GB | Sweden_Internet_Exchange KeFF Networks Ltd | 256 | — | 1 |
| AS49049GB | BATH-NORTH-EAST-SOMERSET-COUNCIL Bath North East Somerset Council | 256 | — | 1 |
| AS203589GB | HOSTWEAVE-AS HOSTWEAVE LTD | 256 | 256 | 2 |
| AS59756GB | ENQUEST-AS Enquest Britain Limited | 256 | — | 1 |
| AS214637GB | Online-Projects-AS Online Projects LTD | 256 | — | 1 |
| AS206512GB | TIGOVA TIGOVA NETWORK LIMITED | 256 | — | 1 |
| AS202808GB | LOGIENET Blairlogie Community and Heritage Trust | 256 | — | 1 |