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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 | 168 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 340 |
| AS212238GB | CDNEXT Datacamp Limited | 1M | 4,120 |
| 1K |
| — |
| 1 |
| AS204258GB | vive-technologies-ltd Vive Technologies Ltd | 1K | 524.3K | 2 |
| AS198798GB | OFLI-AS OFFICE LIMITED | 1K | 2 | 6 |
| AS56670GB | WSCC-AS West Sussex County Council | 1K | — | 2 |
| AS208311GB | BOURNELEISURE Bourne Leisure Limited | 1K | — | 1 |
| AS213451GB | CILIXNET-AS Cilix Limited | 1K | 65.5K | 5 |
| AS208330GB | ASBLX BLX Limited | 1K | — | 1 |
| AS211912GB | WHG-USE2 WHG Hosting Services Ltd | 1K | — | 4 |
| AS199462GB | NETISP-UK-AS NETISP LTD | 1K | 655.4K | 13 |
| AS208402GB | cerner Cerner Limited | 1K | 128 | 2 |
| AS60015GB | CODESTONECLOUD Codestone Solutions Limited | 1K | — | 4 |
| AS203171GB | CHITECHNOLOGY Chi Technology Ltd | 1K | — | 4 |
| AS214437GB | nexgen-eu1 NexGen Cloud Ltd | 1K | — | 3 |
| AS206078GB | UltraNetworks UltraNetworks Limited | 1K | — | 4 |
| AS60333GB | UOMCOMM The University of Manchester | 1K | — | 1 |
| AS50510GB | CRUK-AS Cancer Research UK | 1K | — | 4 |
| AS202907GB | ATOMICIT Atomic IT Limited | 1K | 524.3K | 2 |
| AS197282GB | WGMAST Wood Group UK Limited | 1K | — | 4 |
| AS205719GB | FORESTSNET-AS FORESTSNET LTD | 1K | 2 | 6 |
| AS44824GB | CALLAGENIX-COLO-LONDON COMMI HOLDINGS LIMITED | 1K | — | 1 |
| AS197758GB | NXLAYER NXLayer Ltd | 1K | 524.3K | 2 |
| AS204247GB | ASDA-UK-AS Asda Stores Limited | 1K | — | 1 |
| AS206681GB | IVISTA Ivista Limited | 1K | 524.3K | 2 |
| AS213183GB | WHG-LUX WHG Hosting Services Ltd | 1K | — | 3 |
| AS202212GB | DWEBS-AS DWebs Ltd | 1K | 65.5K | 2 |
| AS208833GB | MYCOMMS MyComms Ltd | 1K | — | 1 |
| AS207827GB | CSL-IOT CSL (DualCom) Limited | 1K | — | 3 |
| AS25030GB | NFU-AS National Farmers Union Mutual Insurance Society Ltd | 1K | — | 3 |
| AS207784GB | HYBIT-SERVICES HybrIT Services Ltd | 1K | — | 4 |
| AS20577GB | TRADEWEB TRADEWEB EUROPE LIMITED | 1K | — | 4 |
| AS205734GB | TRAPOC Copart UK Limited | 1K | — | 4 |
| AS210101GB | cyber Cyber Pathogen Ltd | 1K | — | 1 |
| AS197462GB | UPHOST-AS UPHOST SOLUTIONS LIMITED | 1K | 1 | 5 |
| AS198312GB | SPECTRAGROUP Spectra Group (uk) Ltd | 1K | 65.5K | 5 |
| AS209447GB | RETN-TR-AS RETN Limited | 1K | — | 1 |
| AS204486GB | CHES-EAST Cheshire East Council | 1K | — | 1 |
| AS208765GB | Bulletproof Bullet Proof VPN Ltd | 1K | 524.3K | 5 |
| AS201506GB | INCITO Incito Limited | 1K | 65.5K | 2 |
| AS200652GB | SIPHON Nuvias UC Limited | 1K | 524.3K | 2 |
| AS20596GB | future Future Publishing Ltd | 1K | 458.8K | 4 |
| AS204414GB | OXAM The OxFORD Asset Management Company Limited | 1K | — | 1 |
| AS59402GB | Virocom Virocom Limited | 1K | 524.3K | 2 |
| AS200052GB | FERAL Feral.io Ltd | 1K | — | 1 |
| AS50432GB | RBS-GBM-UKSTAFF Natwest Markets PLC | 1K | — | 3 |
| AS197223GB | WEDROPCODE-AS WEDROPCODE LTD | 1K | — | 4 |
| AS51601GB | IPTP IPTP LTD | 1K | 4.1K | 3 |
| AS216207GB | NEWCASTLE-COUNCIL-AS Newcastle City Council | 1K | — | 3 |