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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 | 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 |
| — |
| 2 |
| AS206324GB | STELLIUM-DC Stellium Networks Limited | 1K | 524.3K | 2 |
| AS206062GB | SpaceDataCentres Space Data Centres Ltd | 1K | — | 1 |
| AS199788GB | MPS Motion Picture Solutions Limited | 1K | — | 1 |
| AS205402GB | INTERCITY-TECH-THN Intercity Technology Ltd | 1K | — | 4 |
| AS34344GB | THE-PORT-OF-TILBURY-LONDON-LTD Port Of Tilbury London Ltd | 1K | — | 3 |
| AS6759GB | IOTX Pelion IoT Limited | 1K | — | 4 |
| AS44749GB | Pinnacom-ISP Pinnacom Ltd | 1K | 1M | 10 |
| AS201506GB | INCITO Incito Limited | 1K | 65.5K | 2 |
| AS206690GB | BFC-FR2 Beeks Financial Cloud Ltd | 1K | — | 4 |
| AS60282GB | COVCITYCOUNCIL Coventry City Council | 1K | — | 1 |
| AS20577GB | TRADEWEB TRADEWEB EUROPE LIMITED | 1K | — | 4 |
| AS214285GB | ABOVEBAR Above Bar Cyber Limited | 1K | 1 | 5 |
| AS201060GB | snetterton SNETTERTON TELECOM LIMITED | 1K | — | 4 |
| AS206681GB | IVISTA Ivista Limited | 1K | — | 1 |
| AS203460GB | vrdn Village Networks Ltd. | 1K | 524.3K | 2 |
| AS56670GB | WSCC-AS West Sussex County Council | 1K | — | 2 |
| AS207511GB | LONDSTOCK-APAC London Stock Exchange PLC | 1K | — | 3 |
| AS62244GB | WBTSUK-AS Watch Tower Bible and Tract Society of Britain | 1K | 65.5K | 2 |
| AS62145GB | Bango BANGO.NET Ltd | 1K | — | 4 |
| AS201024GB | DATAWEBGLOBAL-AS DATAWEB GLOBAL LP. | 1K | — | 2 |
| AS60011GB | MYTHIC-BEASTS-USA Mythic Beasts Ltd | 1K | 131.1K | 6 |
| AS208833GB | MYCOMMS MyComms Ltd | 1K | — | 1 |
| AS44824GB | CALLAGENIX-COLO-LONDON COMMI HOLDINGS LIMITED | 1K | — | 1 |
| AS210096GB | Stemconnect Stem Connect LTD | 1K | — | 1 |
| AS208524GB | VITS-Hosting-Services VITS LIMITED | 1K | — | 1 |
| AS39610GB | LCH-CLEARNET LCH Group Holdings Limited | 1K | — | 3 |
| AS30756GB | CENDANT-AS Travelport International Limited | 1K | — | 2 |
| AS207827GB | CSL-IOT CSL (DualCom) Limited | 1K | — | 3 |
| AS204258GB | vive-technologies-ltd Vive Technologies Ltd | 1K | 524.3K | 2 |
| AS44052GB | PRESSCOMPUTER-ASN ICONIC MEDIA SYSTEMS LIMITED | 1K | — | 3 |
| AS206984GB | lypy Lypy Limited | 1K | 524.3K | 3 |
| AS39173GB | IFDS-AS SS&C FINANCIAL SERVICES INTERNATIONAL LIMITED | 1K | — | 2 |
| AS50468GB | CITRUS-AS CITRUS TELECOMMUNICATIONS LTD | 1K | — | 4 |
| AS198306GB | AESL1 AIG Europe (Services) Limited | 1K | — | 3 |
| AS207524GB | LONDSTOCK-US London Stock Exchange PLC | 1K | — | 3 |
| AS12884GB | DRW-Investments-AS DRW Investments (UK) Limited | 1K | — | 4 |
| AS44955GB | DG-TECHNOLOGY DG Infrastructure Ltd | 1K | — | 4 |
| AS205565GB | BASETELECOMMUNICATIONSLLP Base Telecommunications LLP | 1K | 524.3K | 2 |
| AS198798GB | OFLI-AS OFFICE LIMITED | 1K | — | 4 |
| AS50510GB | CRUK-AS Cancer Research UK | 1K | — | 4 |
| AS198312GB | SPECTRAGROUP Spectra Group (uk) Ltd | 1K | 65.5K | 5 |
| AS204264GB | PUREIP Pure IP Limited | 1K | — | 1 |
| AS204598GB | AS-VILLAGENETWORKS Village Networks Ltd. | 1K | 524.3K | 4 |
| AS60333GB | UOMCOMM The University of Manchester | 1K | — | 1 |
| AS50882GB | MAXNETT Maxnett Ltd. | 1K | — | 1 |
| AS197234GB | stylez STYLEZ AI LTD | 1K | — | 4 |