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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 | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 968.4K | 3,979 |
| 512 |
| — |
| 2 |
| AS211476GB | techloq-uk Techloq Limited | 512 | 65.5K | 3 |
| AS47535GB | javelinbroadband JAVELIN BROADBAND LIMITED | 512 | — | 2 |
| AS56644GB | SYNFS-AS Fundtech Financial Messaging Ltd | 512 | — | 2 |
| AS49607GB | AdvancePayment ZEMPLER BANK LIMITED | 512 | — | 2 |
| AS60382GB | CRANLEIGH-AS Cranleigh School | 512 | — | 2 |
| AS49503GB | IDE-GROUP-MANAGE MAINFRAME & CYBERNETIC SYSTEMS LIMITED | 512 | — | 1 |
| AS212152GB | AS-Beazley Beazley Management Limited | 512 | — | 2 |
| AS41839GB | ConcentrixEuropeLtd Concentrix Europe Limited | 512 | — | 2 |
| AS199706GB | BLOCK-AS Block Solutions Ltd | 512 | — | 2 |
| AS42053GB | STARLING Starling Bank Limited | 512 | — | 2 |
| AS197407GB | CUCE CHINA UNICOM (EUROPE) OPERATIONS LIMITED | 512 | — | 2 |
| AS33981GB | TSYS-AS Total System Services Processing Europe Limited | 512 | — | 2 |
| AS205900GB | APC-Solutions APC Solutions UK Ltd | 512 | — | 2 |
| AS207673GB | UK-PERFORMCONTENT Perform Content Services Limited | 512 | — | 1 |
| AS39150GB | HOSTING-TELECOM-AS HOSTING TELECOM LTD | 512 | 327.7K | 7 |
| AS214861GB | CloudExa-Hosting CloudExa-Hosting LTD | 512 | — | 2 |
| AS203795GB | uk-fidelis-1-as FIDELIS MARKETING LIMITED | 512 | — | 2 |
| AS8619GB | closebrothers-as Close Brothers Limited | 512 | — | 2 |
| AS215320GB | AlncomAS2 ALNWICK COMPUTERWARE LTD. | 512 | 131.1K | 3 |
| AS59876GB | SHELFSPACE Thomas James Elliott | 512 | 1 | 3 |
| AS215662GB | KENSINGTON KENSINGTON MORTGAGE COMPANY LIMITED | 512 | — | 2 |
| AS202610GB | NEKO-AS NekoClaw Ltd | 512 | 2 | 4 |
| AS203107GB | Gemini-Exchange GEMINI PAYMENTS UK, LTD | 512 | — | 2 |
| AS214661GB | AliceNetwork ALICE NETWORKS LTD | 512 | — | 2 |
| AS62299GB | BLUEMATRIX-AS Bluematrix Research LTD | 512 | — | 2 |
| AS213051GB | ZENEX5IVE-US Zenex 5ive Limited | 512 | — | 2 |
| AS28715GB | BrassHornComms Brass Horn Communications | 512 | 8.2K | 4 |
| AS198957GB | SYSTEMFORCE_AS System Force I.T. Ltd | 512 | — | 2 |
| AS50656GB | Optix-Software-ASN Optix Software Ltd | 512 | — | 2 |
| AS206166GB | SCHRODERS-UK-AS Schroder Investment Management Limited | 512 | — | 2 |
| AS198071GB | BERCHSOLUTIONS-AS Berch Solutions Limited | 512 | 16 | 3 |
| AS209765GB | AspireMedia ASPIRE MEDIA GROUP LIMITED | 512 | — | 2 |
| AS215742GB | Duplia Duplia Ltd | 512 | 65.5K | 3 |
| AS201528GB | ORCHID-CELLMARK-CHORLEY Orchid Cellmark Ltd | 512 | 1 | 3 |
| AS212469GB | GREENCO-ISP ServerHouse Ltd | 512 | — | 1 |
| AS202416GB | DATALORDS Kart Technologies Limited | 512 | 524.3K | 4 |
| AS211760GB | CCL-LDN Cleveland Clinic London Ltd | 512 | — | 2 |
| AS198219GB | CHARLIE-AS Charlie Camilleri | 512 | 10 | 5 |
| AS6540GB | SAMUEL-COSGROVE Samuel Cosgrove | 512 | 524.3K | 3 |
| AS199379GB | MARKERSTUDY-AS Markerstudy Insurance Services Limited | 512 | — | 2 |
| AS49313GB | SEVAHOST-AS Seva-Host Ltd | 512 | — | 2 |
| AS211675GB | LAYERSHIFT-NETWORKS Layershift Limited | 512 | 65.5K | 2 |
| AS207520GB | EXODUSPOINT-CAPITAL-MANAGEMENT-UK ExodusPoint Capital Management UK, LLP | 512 | — | 2 |
| AS215419GB | karizanta Karizanta LTD | 512 | 2 | 4 |
| AS204844GB | NCSE-NETWORK-Global NCSE NETWORK LTD | 512 | 4.4K | 16 |
| AS48682GB | IPSL IP Space Limited | 512 | — | 2 |