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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 |
| 2K |
| 131.1K |
| 10 |
| AS209505GB | UNCHAINEDISP Unchained ISP Limited | 2K | 344.1K | 8 |
| AS47685GB | ASN-BOGONS-HEAVY-NORTH Bogons Heavy Industries (North) Ltd | 2K | — | 1 |
| AS41400GB | GNOL-AS R.M. Wotton T/A G-Net Online | 2K | 524.3K | 3 |
| AS206547GB | CDK-Global-EU Keyloop Holdings (UK) Limited | 2K | — | 4 |
| AS200961GB | FWI2-ASN FIL INVESTMENT MANAGEMENT LIMITED | 2K | — | 8 |
| AS44442GB | TelfordWrekinCouncilAS The Borough of Telford and Wrekin Council | 2K | — | 1 |
| AS47113GB | SLP Suffolk Life Pensions Limited | 2K | — | 1 |
| AS59933GB | SENSICAL Sensical Services Limited | 2K | 65.5K | 4 |
| AS202206GB | MOTIVE FAT MEDIA LTD | 2K | — | 7 |
| AS58305GB | SYN-US SYN LTD | 2K | 13 | 21 |
| AS205693GB | dvla Driver & Vehicle Licensing Agency | 2K | — | 4 |
| AS49418GB | AS-NETSHIELD NETSHIELD LTD | 2K | 68 | 13 |
| AS21188GB | UNILEVER-ES-UK Unilever PLC | 2K | — | 4 |
| AS200700GB | BMC_UK-1 BMC TV LTD | 2K | — | 5 |
| AS50202GB | HISCOXGROUP-AS Hiscox Underwriting Group Services Ltd | 2K | — | 4 |
| AS8444GB | HENDERSON JANUS HENDERSON ADMINISTRATION UK LIMITED | 2K | — | 8 |
| AS51572GB | CERULEAN Cerulean Solutions Limited | 2K | — | 1 |
| AS215262GB | CLOUDNORD-UKNODE-AS Cloud Nord Limited | 2K | 18 | 9 |
| AS199675GB | WGSLEDC Willis Group Services Ltd | 2K | — | 5 |
| AS34350GB | MANGROUP Man Investments Limited | 2K | — | 5 |
| AS42880GB | HP-BCRS-UK EntServ UK Limited | 2K | — | 1 |
| AS43534GB | CREDITCALL Network Merchants Limited | 2K | — | 5 |
| AS31223GB | EA-UK-LHR Electronic Arts Limited | 2K | — | 2 |
| AS210970GB | mosento mosento LTD | 2K | — | 8 |
| AS202312GB | SMBCNIKKOCM SMBC Bank International plc | 2K | 65.5K | 7 |
| AS203372GB | GSACAPITAL-EU-AS GSA Capital Services Ltd | 2K | — | 3 |
| AS49247GB | ESFRS East Sussex Fire Authority | 2K | — | 1 |
| AS215468GB | LOCKBOX LOCKBOX NETWORKS LLP | 2K | — | 8 |
| AS60841GB | BERRYBYTE berrybyte Limited | 2K | — | 8 |
| AS201358GB | FNZ-UK FNZ (UK) Ltd | 2K | — | 3 |
| AS201542GB | micloud Mitel Networks Limited | 2K | — | 5 |
| AS44971GB | GOETEC-AS University of Kent | 2K | 4.1K | 2 |
| AS207096GB | aslinkweb Link Web Solutions LLP | 2K | 524.3K | 5 |
| AS61012GB | LIVEDRIVE Livedrive Internet Ltd. | 2K | 65.5K | 4 |
| AS204436GB | KUALO-AS Kualo Limited | 2K | 65.5K | 3 |
| AS34499GB | BlackBox-LINX BlackBox Hosting Ltd | 2K | — | 5 |
| AS200203GB | DATABRIDGE GLOBAL DATA BRIDGE INTERNATIONAL LIMITED | 2K | 12.3K | 11 |
| AS8942GB | Costar UK Limited | 2K | — | 4 |
| AS209738GB | IONFIBRE CURVE INFORMATION TECHNOLOGY LIMITED | 2K | — | 8 |
| AS34134GB | FREECLIX FreeClix Ltd | 2K | 524.3K | 5 |
| AS198850GB | HOGARTH-WORLDWIDE WPP PRODUCTION LIMITED | 2K | — | 1 |
| AS35259GB | APM APM Internet Ltd | 2K | — | 1 |
| AS47704GB | ACADEMIA-AS Academia Ltd | 2K | 524.3K | 4 |
| AS203842GB | AcoraAPC-AS Acora Limited | 2K | — | 2 |
| AS206999GB | oakfordis Oakford Internet Services Ltd | 2K | — | 8 |
| AS50948GB | amdocs-uk-dc-as AMDOCS (UK) LIMITED | 2K | — | 6 |