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How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.
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 | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
| 1K |
| — |
| 4 |
| AS205052GB | VISIONDATASOLUTIONS Vision Data Solutions LLP | 1K | 524.3K | 3 |
| AS213549GB | SATISFYHOST SATISFYHOST LTD | 1K | 2 | 6 |
| AS210096GB | Stemconnect Stem Connect LTD | 1K | — | 1 |
| AS60333GB | UOMCOMM The University of Manchester | 1K | — | 1 |
| AS60237GB | theWestBrom WEST BROMWICH BUILDING SOCIETY FOUNDATION | 1K | — | 1 |
| AS201506GB | INCITO Incito Limited | 1K | 65.5K | 2 |
| AS205996GB | Interfiber Interfiber Ltd | 1K | 65.5K | 2 |
| AS205734GB | TRAPOC Copart UK Limited | 1K | — | 4 |
| AS57650GB | NOMIOS-ASN Nomios UK&I Limited | 1K | 524.3K | 2 |
| AS198723GB | UNI-READING University of Reading | 1K | 1 | 4 |
| AS29164GB | IOMARTHOSTING-EU Iomart Group Plc | 1K | 65.5K | 5 |
| AS208833GB | MYCOMMS MyComms Ltd | 1K | — | 1 |
| AS12884GB | DRW-Investments-AS DRW Investments (UK) Limited | 1K | — | 4 |
| AS198312GB | SPECTRAGROUP Spectra Group (uk) Ltd | 1K | 65.5K | 5 |
| AS209899GB | NUBIS zananet Limited | 1K | — | 1 |
| AS30756GB | CENDANT-AS Travelport International Limited | 1K | — | 2 |
| AS50468GB | CITRUS-AS CITRUS TELECOMMUNICATIONS LTD | 1K | — | 4 |
| AS214285GB | ABOVEBAR Above Bar Cyber Limited | 1K | 1 | 5 |
| AS44824GB | CALLAGENIX-COLO-LONDON COMMI HOLDINGS LIMITED | 1K | — | 1 |
| AS39414GB | BYTEFETCH ByteFetch Ltd | 1K | — | 1 |
| AS56637GB | Fixnetix Fixnetix Ltd | 1K | — | 3 |
| AS210087GB | ONTIX Ontix Sites No1 Limited | 1K | — | 1 |
| AS203460GB | vrdn Village Networks Ltd. | 1K | 524.3K | 2 |
| AS214116GB | AcoraAPC2-AS Acora Limited | 1K | — | 1 |
| AS39610GB | LCH-CLEARNET LCH Group Holdings Limited | 1K | — | 3 |
| AS205389GB | ZOOM-INTERNET Zoom Internet Ltd | 1K | 65.5K | 2 |
| AS213183GB | WHG-LUX WHG Hosting Services Ltd | 1K | — | 3 |
| AS51031GB | StarNetwork w1n ltd | 1K | 1 | 4 |
| AS202212GB | DWEBS-AS DWebs Ltd | 1K | 65.5K | 2 |
| AS201289GB | ESENDEX COMMIFY UK LIMITED | 1K | — | 1 |
| AS59439GB | VOICEFACTORY-AS EvolveIP LTD | 1K | 0 | 2 |
| AS33968GB | InternetEngineeringAS EASYSPACE LIMITED | 1K | — | 1 |
| AS204236GB | uk-div011 Daniel Ionita | 1K | — | 1 |
| AS208408GB | KARANYI Karanyi Ltd | 1K | 4 | 8 |
| AS213451GB | CILIXNET-AS Cilix Limited | 1K | 65.5K | 5 |
| AS203171GB | CHITECHNOLOGY Chi Technology Ltd | 1K | — | 4 |
| AS43442GB | PROVU ProVu Communications Ltd | 1K | 1 | 2 |
| AS50882GB | MAXNETT Maxnett Ltd. | 1K | — | 1 |
| AS41281GB | KEFF KeFF Networks Ltd | 1K | 2 | 6 |
| AS204486GB | CHES-EAST Cheshire East Council | 1K | — | 1 |
| AS215925GB | VPSVAULTHOST VPSVAULT.HOST LTD | 1K | 16 | 5 |
| AS44749GB | Pinnacom-ISP Pinnacom Ltd | 1K | 1M | 10 |
| AS212413GB | DWP Department for Work and Pensions | 1K | — | 3 |
| AS197758GB | NXLAYER NXLayer Ltd | 1K | 524.3K | 2 |
| AS207511GB | LONDSTOCK-APAC London Stock Exchange PLC | 1K | — | 3 |
| AS34344GB | THE-PORT-OF-TILBURY-LONDON-LTD Port Of Tilbury London Ltd | 1K | — | 3 |