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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.
3,134 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 | 368 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,290 |
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| 0 |
| AS28705GB | CYBASE-AS Cybase Limited | — | — | 0 |
| AS59893GB | FRC-AS Free Range Cloud Ltd. | — | 4 | 4 |
| AS214332GB | IXMidlands-Route-Servers Exascale Ltd | — | — | 0 |
| AS35433GB | Zzoomm Full Fibre Limited | — | — | 0 |
| AS35694GB | SIEMENS-COMMUNICATIONS-SOLUTION-1 GTT - EMEA Ltd. | — | — | 0 |
| AS210683GB | syo Syo.io Limited | — | 1 | 1 |
| AS44374GB | johnbenson Yorkshire Tech Limited | — | — | 0 |
| AS49926GB | Alex-Zero Alex XZ Cypher Zero | — | — | 0 |
| AS52167GB | BANDWIDTH-USA Hydra Communications Ltd | — | — | 0 |
| AS44474GB | Spectron-Services-Ltd Marex Financial Ltd | — | — | 0 |
| AS214984GB | CUHK CUHK LTD. | — | — | 0 |
| AS215159GB | RokosServicesUK Rokos Services (UK) Limited | — | — | 0 |
| AS203504GB | Tomas-Freitas-Fernandes Tomas Freitas Fernandes | — | 2 | 2 |
| AS206671GB | NotMike Michael Jones | — | — | 0 |
| AS21356GB | XchangePointMLP GTT - EMEA Ltd. | — | — | 0 |
| AS200365GB | Possibly-Lizards Possibly Lizards Limited | — | 257 | 2 |
| AS28816GB | CHESS-ICT-MAN Chess ICT Ltd | — | — | 0 |
| AS59621GB | FloNetworks-AS Flo Networks Limited | — | — | 0 |
| AS57604GB | VPLAB-NL VPLAB LTD | — | — | 0 |
| AS213201GB | AS213201 Mathew Philipps | — | — | 0 |
| AS218744GB | AYDAN-AS Aydan Abrahams | — | 1 | 1 |
| AS49999GB | BANDWIDTHTECH-AS Hydra Communications Ltd | — | — | 0 |
| AS50935GB | International-Hosting-Solutions-AS INTERNATIONAL HOSTING SOLUTIONS LLP | — | — | 0 |
| AS213434GB | GALACTIX Rhys Woolcott | — | 17 | 2 |
| AS198332GB | HOSTINGSYSTEMS-AS32 Hosting Systems Ltd | — | — | 0 |
| AS208051GB | SR2COM SR2 Communications Limited | — | 32 | 2 |
| AS199843GB | MINDTHECLOUD-AS Mindthecloud Ltd | — | — | 0 |
| AS51939GB | TerraMC Terra Management Consulting Ltd | — | 10 | 10 |
| AS207135GB | Giotsas Vasileios Giotsas | — | 2 | 2 |
| AS200671GB | START-AS START BUILDING LTD | — | 1 | 1 |
| AS35662GB | IOMARTHOSTING Iomart Managed Services Limited | — | — | 0 |
| AS38237GB | LOADEDGE LoadEdge Limited | — | — | 0 |
| AS50773GB | ASN-Anana16 Sabio Ltd. | — | — | 0 |
| AS213507GB | SKYQUANTUM-TELECOM SKYQUANTUM TELECOM LTD. | — | 1.1M | 34 |
| AS60477GB | SIXDG-INSITE Six Degrees Technology Group Limited | — | — | 0 |
| AS132865GB | CMSL-AS-AP - Connect Managed Services (UK) Limited | — | — | 0 |
| AS199748GB | CCN-UK Voneus Ltd | — | — | 0 |
| AS205058GB | MAEEKO MAGICAL NETWORK LIMITED | — | 5 | 4 |
| AS202415GB | IDSI-2 Integrated Digital Services Ltd | — | — | 0 |
| AS43565GB | JumboIX IPTP LTD | — | — | 0 |
| AS207427GB | IBILLY-MEDIA-GROUP-LTD IBILLY MEDIA GROUP LTD | — | — | 0 |
| AS209230GB | SERVERNET-ASv SERVERNET INTERNET LIMITED | — | — | 0 |
| AS211787GB | Rolosoft-Ltd Rolosoft Limited | — | — | 0 |
| AS209364GB | OME-LOGIC-AS Ome Logic Ltd | — | — | 0 |
| AS209536GB | Marex-SA-AS Spectron Services Limited | — | — | 0 |
| AS148971GB | KEIBIIN-AS-AP - Keibiin's Holdings Limited | — | 313 | 13 |