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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 |
| AS213451GB | CILIXNET-AS Cilix Limited | 1K | 65.5K | 5 |
| AS60333GB | UOMCOMM The University of Manchester | 1K | — | 1 |
| AS204264GB | PUREIP Pure IP Limited | 1K | — | 1 |
| AS201024GB | DATAWEBGLOBAL-AS DATAWEB GLOBAL LP. | 1K | — | 2 |
| AS210087GB | ONTIX Ontix Sites No1 Limited | 1K | — | 1 |
| AS210096GB | Stemconnect Stem Connect LTD | 1K | — | 1 |
| AS203460GB | vrdn Village Networks Ltd. | 1K | 524.3K | 2 |
| AS208330GB | ASBLX BLX Limited | 1K | — | 1 |
| AS210495GB | WENIUM WENIUM LTD | 1K | 16 | 5 |
| AS206984GB | lypy Lypy Limited | 1K | 524.3K | 3 |
| AS202114GB | Blue_Sky_Systems Blue Sky Systems Limited | 1K | 65.5K | 5 |
| AS199569GB | Cognizant-EU-AS Cognizant Worldwide Limited | 1K | 65.5K | 3 |
| AS44955GB | DG-TECHNOLOGY DG Infrastructure Ltd | 1K | — | 4 |
| AS56637GB | Fixnetix Fixnetix Ltd | 1K | — | 3 |
| AS202212GB | DWEBS-AS DWebs Ltd | 1K | 65.5K | 2 |
| AS209899GB | NUBIS zananet Limited | 1K | — | 1 |
| AS209113GB | PRECEDENCE Precedence Technologies Ltd | 1K | — | 3 |
| AS33968GB | InternetEngineeringAS EASYSPACE LIMITED | 1K | — | 1 |
| AS205052GB | VISIONDATASOLUTIONS Vision Data Solutions LLP | 1K | 524.3K | 3 |
| AS60282GB | COVCITYCOUNCIL Coventry City Council | 1K | — | 1 |
| AS215286GB | IXROOT IXROOT LTD | 1K | — | 4 |
| AS47492GB | CONSIDERIT Consider IT Limited | 1K | — | 4 |
| AS208408GB | KARANYI Karanyi Ltd | 1K | 4 | 8 |
| AS214437GB | nexgen-eu1 NexGen Cloud Ltd | 1K | — | 3 |
| AS50489GB | ORIEDGE Radiant Infrastructure 1 Limited | 1K | — | 4 |
| AS198306GB | AESL1 AIG Europe (Services) Limited | 1K | — | 3 |
| AS204258GB | vive-technologies-ltd Vive Technologies Ltd | 1K | 524.3K | 2 |
| AS60851GB | EMIS-AS Egton Medical Information Systems Limited | 1K | — | 2 |
| AS201506GB | INCITO Incito Limited | 1K | 65.5K | 2 |
| AS206324GB | STELLIUM-DC Stellium Networks Limited | 1K | 524.3K | 2 |
| AS215672GB | MoeChuang-Network MoeChuang Network Limited | 1K | 17 | 6 |
| AS197594GB | REDSTOR-AS Redstor Limited | 1K | — | 4 |
| AS6759GB | IOTX Pelion IoT Limited | 1K | — | 4 |
| AS134536GB | ATT-NBE-GB - ATT NBE Equinix London | 1K | — | 4 |
| AS197758GB | NXLAYER NXLayer Ltd | 1K | 524.3K | 2 |
| AS41281GB | KEFF KeFF Networks Ltd | 1K | 2 | 6 |
| AS50882GB | MAXNETT Maxnett Ltd. | 1K | — | 1 |
| AS205996GB | Interfiber Interfiber Ltd | 1K | 65.5K | 2 |
| AS197234GB | stylez STYLEZ AI LTD | 1K | — | 4 |
| AS39414GB | BYTEFETCH ByteFetch Ltd | 1K | — | 1 |
| AS30756GB | CENDANT-AS Travelport International Limited | 1K | — | 2 |
| AS39610GB | LCH-CLEARNET LCH Group Holdings Limited | 1K | — | 3 |
| AS213183GB | WHG-LUX WHG Hosting Services Ltd | 1K | — | 3 |
| AS206357GB | ALDERMORE Aldermore Bank PLC | 1K | — | 3 |
| AS44052GB | PRESSCOMPUTER-ASN ICONIC MEDIA SYSTEMS LIMITED | 1K | — | 3 |
| AS207511GB | LONDSTOCK-APAC London Stock Exchange PLC | 1K | — | 3 |