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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 | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 968.4K | 3,979 |
| UCNS-AS UCNS Limited |
| 1.3K |
| — |
| 5 |
| AS39621GB | STREAMUK-AS Stream UK Media Services Limited | 1.3K | — | 4 |
| AS209082GB | SWLINES Swlines Ltd | 1.3K | 1 | 6 |
| AS204670GB | NTT NTT United Kingdom Ltd | 1.3K | — | 5 |
| AS206069GB | CORNSEED Cornseed Limited | 1.3K | 3 | 7 |
| AS215468GB | LOCKBOX LOCKBOX NETWORKS LLP | 1.3K | — | 5 |
| AS21346GB | VISTORM-AS Enterprise Services Information Security UK Limited | 1.3K | — | 5 |
| AS49937GB | INTERACTIVESPORTS Interactive Sports Limited | 1.3K | — | 5 |
| AS212701GB | HOSTINUX-AS Hostinux Limited | 1.3K | 1 | 6 |
| AS59717GB | ARCO-AS Arco Limited | 1.3K | 524.3K | 3 |
| AS211844GB | SWATER-ASN Southern Water Services Ltd | 1.3K | — | 5 |
| AS200105GB | JUNGLELABS JUNGLELABS LTD | 1.3K | 1 | 6 |
| AS49657GB | TNSI Transaction Network Services (UK) LTD | 1.3K | — | 4 |
| AS202052GB | CTS-GROUP CTS Group Ltd | 1.3K | — | 2 |
| AS213790GB | LimitedNetwork-AS Limited Network LTD | 1.3K | — | 5 |
| AS206733GB | BFC-HK Beeks Financial Cloud Ltd | 1.3K | — | 5 |
| AS216180GB | WHG-AUS WHG Hosting Services Ltd | 1.3K | — | 5 |
| AS8952GB | NTT-EUROPE NTT United Kingdom Ltd | 1.3K | — | 4 |
| AS39602GB | TCG-AS The Cent.re Group Limited | 1.3K | 524.3K | 5 |
| AS31050GB | FRAMESTORE The Framestore Limited | 1.3K | — | 5 |
| AS213737GB | DexDC AYOSOFT LTD | 1.3K | 2 | 7 |
| AS47823GB | NHL-AS2 Netwise Hosting Ltd | 1.3K | — | 2 |
| AS48901GB | DSNET-CSP DSNET Ltd | 1.3K | 65.5K | 5 |
| AS205545GB | E-WIRE JIWA Holdings Ltd | 1.3K | — | 2 |
| AS198426GB | Voneus Voneus Ltd | 1.3K | — | 2 |
| AS60492GB | MIMECAST-JE Mimecast Services Limited | 1.3K | — | 5 |
| AS207310GB | cinos Cinos Communications Services Limited | 1.3K | — | 5 |
| AS203354GB | VIEWSAT-AS Viewsat ltd. | 1.3K | — | 2 |
| AS24705GB | ECOM-SPARE Single Mode Networks Ltd | 1.3K | — | 2 |
| AS24633GB | XICON BCN Group Hosting Ltd | 1.3K | — | 2 |
| AS215759GB | Ziax Ziax Ltd | 1.3K | 2 | 7 |
| AS199456GB | VLDTECH-ASN VALID TECHNOLOGY L.P. | 1.3K | 32.8K | 7 |
| AS60962GB | BZ Foreign and Commonwealth Office | 1.3K | — | 3 |
| AS48704GB | AS-FRESHWAVE Freshwave Services Limited | 1.3K | 1M | 7 |
| AS28959GB | VITOL-AS Vitol Services Ltd | 1.3K | — | 5 |
| AS47549GB | HOSTINGSYSTEMS-AS Hosting Systems Ltd | 1.3K | — | 5 |
| AS215674GB | BROOKPLUS-LIMITED Brookplus Limited | 1.3K | — | 5 |
| AS47318GB | WMAS West Midlands Ambulance Service NHS Foundation Trust | 1.3K | — | 4 |
| AS211167GB | ITFARM IT Farm Limited | 1.3K | — | 5 |
| AS213513GB | COMPUTLE Computle Limited | 1.3K | 524.3K | 6 |
| AS210062GB | BARRITEL-LON-THN Barritel Ltd | 1.3K | 65.5K | 5 |
| AS204415GB | nexgen NexGen Cloud Ltd | 1.3K | — | 4 |
| AS212633GB | EE-Mobile EE Mobile Telecom Ltd | 1.3K | 524.3K | 6 |
| AS41103GB | CLEARIP-AS teleBIZZ Ltd | 1.3K | 65.5K | 4 |
| AS215128GB | iONLINE-ISP-UK IONLINE INTERNET SOLUTIONS PROVIDER LTD | 1.3K | 524.3K | 5 |
| AS215304GB | SOLREN SOLREN LIMITED | 1.3K | — | 5 |
| AS62417GB | DIGITALK_CLOUD_THW DIGITALK Limited | 1.3K | — | 5 |