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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 | 4,127 |
| 256 |
| — |
| 1 |
| AS200692GB | KO-EU-ASN1 KLDiscovery Limited | 256 | — | 1 |
| AS25464GB | TELESIGN-AS Telesign Mobile Limited | 256 | — | 1 |
| AS60894GB | FLOWNET Flownet Solutions Ltd | 256 | 17 | 3 |
| AS61427GB | SARGASSO-DC-AS Sargasso N1 Limited | 256 | — | 1 |
| AS201694GB | RethinkTS Rethink Technology Solutions Ltd | 256 | — | 1 |
| AS215636GB | NUSO-FRA NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS59660GB | DATAART-RDC DataArt Technologies UK Ltd | 256 | — | 1 |
| AS213565GB | Badonde-Networks David Davies | 256 | 65.5K | 3 |
| AS203826GB | TRANQUILA-HOST-AS Tranquila-Host ltd. | 256 | — | 1 |
| AS212880GB | AS-LLTN-RIPE Rydal Communications Ltd | 256 | — | 1 |
| AS211855GB | FRAMES In The Frame (Manchester) Ltd | 256 | — | 1 |
| AS206976GB | KADFIRE Kadfire Limited | 256 | 2 | 3 |
| AS47791GB | EA-FI-HELSINKI Electronic Arts Limited | 256 | — | 1 |
| AS39459GB | PGL-AS Office Unlocked Limited | 256 | — | 1 |
| AS21160GB | ASN-MARKEL Markel International Services Ltd | 256 | — | 1 |
| AS198472GB | MANCHESTER-CC-AS Manchester City Council | 256 | — | 1 |
| AS214284GB | OTTCLUB-AS INTERNET MEDIA STREAM LTD | 256 | — | 1 |
| AS43392GB | BLUEBAY-ASSET-AS RBC Global Asset Management (UK) Limited | 256 | — | 1 |
| AS216186GB | AS_PENTEST Pen Test Partners LLP | 256 | 65.5K | 2 |
| AS57408GB | REED-SMITH-EU-ASN Reed Smith LLP | 256 | — | 1 |
| AS209297GB | AS-NICHI-YOROZUYA NICHI YOROZUYA LTD | 256 | 33 | 4 |
| AS203253GB | CHERRYTOP-AS Cherrytop Ltd | 256 | — | 1 |
| AS211198GB | WHITESPIDER WhiteSpider Enterprise Services Limited | 256 | — | 1 |
| AS213515GB | Honeybank-Studios Honeybank Studios LTD | 256 | — | 1 |
| AS215915GB | DEEPGREEN Deep Green Technologies Ltd | 256 | — | 1 |
| AS214424GB | NFORTO-AS nForto Ltd | 256 | — | 1 |
| AS214323GB | MSH-UK Marcus Hughes | 256 | 2 | 3 |
| AS62112GB | XCONNECT-NL XConnect Services Limited | 256 | — | 1 |
| AS60339GB | H3GUK Hutchison 3G UK Limited | 256 | — | 1 |
| AS206974GB | LALDY Laldy Ltd | 256 | — | 1 |
| AS43131GB | KAY-NET Kay Net (UK) Ltd | 256 | 16 | 2 |
| AS202939GB | CHIMON-NETWORK Chimon Technology Ltd | 256 | 849 | 22 |
| AS216361GB | NiN Next Internet Network Ltd | 256 | — | 1 |
| AS34675GB | PIH-UK Prima Internet Holdings Limited | 256 | — | 1 |
| AS202264GB | DMESG-ICT-LTD DMESG ICT Ltd | 256 | — | 1 |
| AS211437GB | SurlyNet Gareth Woolridge | 256 | 16 | 2 |
| AS209324GB | BG-SOF Genius Sports UK Limited | 256 | — | 1 |
| AS60977GB | NVIDIA-NGN NVIDIA Ltd | 256 | — | 1 |
| AS201487GB | nsmnet Nathan Morgan | 256 | — | 1 |
| AS211289GB | JOSH Joshua Leahy | 256 | 524.3K | 2 |
| AS199385GB | GNOME Midland Press Ltd | 256 | — | 1 |
| AS200251GB | cwg Cineworld Cinemas Limited | 256 | — | 1 |
| AS50108GB | EA-UK-BIR Electronic Arts Limited | 256 | — | 1 |
| AS204097GB | IQVIA-Germany2 IQVIA LTD. | 256 | — | 1 |
| AS58007GB | Witine Witine Limited | 256 | — | 1 |
| AS200027GB | RDA-TELECOM RDA GROUP LIMITED | 256 | 1 | 2 |