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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.
3,132 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 369 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,286 |
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| AS214749GB | PAW James Cahill | — | 7 | 7 |
| AS213436GB | NIUZI_DADA_CLOUD NIUZI DADA CLOUD LIMITED | — | 1K | 1 |
| AS213092GB | marbleis Acrion International Limited | — | 28 | 13 |
| AS41393GB | NASSTAR-AS GCI Network Solutions Limited | — | — | 0 |
| AS6745GB | QUZA-UK Lumen Technologies UK Limited | — | — | 0 |
| AS210396GB | broadwaypartners Voneus Ltd | — | — | 0 |
| AS213026GB | GWILKINSON George Wilkinson | — | 2 | 2 |
| AS212180GB | ERL-HSCN Everlight Radiology Limited | — | — | 0 |
| AS29478GB | JUNESTA Karl Dyson | — | 2 | 2 |
| AS201762GB | RBK-AS Royal Borough of Kingston Council | — | — | 0 |
| AS204931GB | PNOSOLUTIONS-AS PNO Solutions Limited | — | 8 | 2 |
| AS201696GB | SHAMILNET Shamil Nunhuck | — | — | 0 |
| AS215159GB | RokosServicesUK Rokos Services (UK) Limited | — | — | 0 |
| AS41448GB | fpl-as Future Publishing Ltd | — | — | 0 |
| AS210387GB | GUARDY Guardy Limited | — | 4.1K | 1 |
| AS20517GB | ASN-TSC1 THE STREAMING COMPANY.COM LIMITED | — | — | 0 |
| AS205058GB | MAEEKO MAGICAL NETWORK LIMITED | — | 5 | 4 |
| AS210996GB | HO-LECN-GUC UK Home Office (The Secretary of State for the Home Department) | — | — | 0 |
| AS213201GB | AS213201 Mathew Philipps | — | — | 0 |
| AS211149GB | legendfibre Talk Straight Ltd. | — | — | 0 |
| AS28705GB | CYBASE-AS Cybase Limited | — | — | 0 |
| AS203397GB | curveit CURVE INFORMATION TECHNOLOGY LIMITED | — | — | 0 |
| AS213507GB | SKYQUANTUM-TELECOM SKYQUANTUM TELECOM LTD. | — | 1M | 32 |
| AS9191GB | NEWNET Digital Space Group Limited | — | — | 0 |
| AS216254GB | GAZLEE Gary Lee | — | — | 0 |
| AS219467GB | SUYOU-NET SUYOU VPN LIMITED | — | — | 0 |
| AS198313GB | SystemHOST Systemhost Limited | — | — | 0 |
| AS61972GB | stixinternet STIX Internet Ltd | — | — | 0 |
| AS49999GB | BANDWIDTHTECH-AS Hydra Communications Ltd | — | — | 0 |
| AS42761GB | BRINKS Brinks Global Services Ltd | — | — | 0 |
| AS216126GB | James-Ledger James Ledger | — | 13 | 13 |
| AS204000GB | YAHOO-LOB Yahoo-UK Limited | — | — | 0 |
| AS213210GB | kingslanding-as Richard-Connon | — | 1 | 1 |
| AS211687GB | HCORE-LTD HCORE LTD | — | — | 0 |
| AS213543GB | JONES-LAB Alexander Jones | — | 1 | 1 |
| AS207734GB | Quika COMMERCIS ME LTD | — | — | 0 |
| AS219370GB | Johnson Benjamin Johnson | — | 22 | 7 |
| AS45028GB | BAREFRUIT-AS Team Blue Carrier Limited | — | — | 0 |
| AS215368GB | CONNORMCF Connor McFarlane | — | 1 | 1 |
| AS213526GB | SECURY SECURY INFORMATION TECHNOLOGIES LTD | — | — | 0 |
| AS200499GB | EHL-AS Enterprises Holding LTD | — | 1 | 1 |
| AS28786GB | ASN-INSL Endava Managed Services Ltd | — | — | 0 |
| AS210533GB | xfour Benjamin Lewis | — | — | 0 |
| AS15845GB | CitC_IRS_Service_AS15845 Computers in the City Ltd | — | — | 0 |
| AS215397GB | JA-Software-Solutions-Limited JA Software Solutions Limited | — | — | 0 |
| AS205292GB | NOMURA-NET2-AS2 Nomura International Plc | — | — | 0 |