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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 | 170 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 336 |
| AS212238GB | CDNEXT Datacamp Limited | 983K | 4,036 |
| 423.4K |
| 1.2M |
| 227 |
| AS42689GB | Glide Glide Student & Residential Limited | 500.2K | 1.6M | 308 |
| AS13037GB | ZEN-AS Zen Internet Ltd | 527.6K | 524.3K | 38 |
| AS30844GB | LIQUID-AS Liquid Telecommunications Ltd | 542.5K | 671.7K | 301 |
| AS3300GB | BT British Telecommunications PLC | 604.2K | 195.6K | 151 |
| AS31655GB | ASN-GammaTelecom Gamma Telecom Holdings Ltd | 614.4K | 1.6M | 39 |
| AS8851GB | EDGE GCI Network Solutions Limited | 621.6K | 1.3M | 224 |
| AS5400GB | BT British Telecommunications PLC | 728.8K | 60M | 111 |
| AS5413GB | Wavenet-AS5413 Wavenet Limited | 740.1K | 1.1M | 106 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 2.8M | 100 |
| AS212238GB | CDNEXT Datacamp Limited | 983K | 37.3M | 4,036 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 148.5K | 336 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 393.2K | 170 |
| AS6871GB | Plusnet British Telecommunications PLC | 2.1M | 598K | 64 |
| AS5378GB | Vodafone Limited | 2.8M | 524.3K | 24 |
| AS786GB | JANET - Jisc Services Limited | 7M | 1.7M | 220 |
| AS5607GB | BSKYB-BROADBAND-AS Sky UK Limited | 7.1M | 2.8M | 81 |
| AS13285GB | OPALTELECOM-AS TalkTalk Communications Limited | 8.4M | 3.3M | 96 |
| AS2856GB | BT-UK-AS British Telecommunications PLC | 18.4M | 8.9M | 492 |
| AS5089GB | NTL Virgin Media Limited | 23M | 8.5M | 300 |