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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.
3,134 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 368 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,229 |
| 222K |
| 1.1M |
| 103 |
| AS25310GB | ASN-CWACCESS Vodafone Limited | 229.4K | — | 4 |
| AS56478GB | BCUBE-AS Hyperoptic Ltd | 238.1K | 77.8K | 112 |
| AS12390GB | KINGSTON-UK-AS KCOM Group Limited | 260.1K | 131.1K | 20 |
| AS8698GB | NATIONWIDE BUILDING SOCIETY | 262.1K | — | 109 |
| AS15914GB | British Airways plc | 288.3K | — | 95 |
| AS25180GB | EXPONENTIAL-E-AS Exponential-E Ltd. | 292.1K | 593.9K | 45 |
| AS35228GB | O2BROADBAND Telefonica UK Limited | 293.6K | 67.6K | 138 |
| AS8468GB | ENTANET Cityfibre Limited | 359.7K | 1.1M | 48 |
| AS62240GB | Clouvider Clouvider Limited | 374.3K | 4.6M | 2,519 |
| AS15395GB | RACKSPACE-LON Rackspace Ltd. | 403.7K | 65.5K | 35 |
| AS20860GB | IOMART-AS IOMART CLOUD SERVICES LIMITED | 422.1K | 1.1M | 223 |
| AS42689GB | Glide Glide Student & Residential Limited | 493.1K | 1.6M | 351 |
| 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 Limited | 604.4K | 195.6K | 152 |
| 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 Limited | 734.5K | 60.4M | 125 |
| AS5413GB | Wavenet-AS5413 Wavenet Limited | 740.6K | 1.1M | 108 |
| AS8426GB | CLARANET-AS Claranet Limited | 910.1K | 2.8M | 103 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 34.3M | 4,229 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 149.5K | 368 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 393.2K | 173 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 598K | 64 |
| AS5378GB | Vodafone Limited | 2.8M | 524.3K | 24 |
| AS5607GB | BSKYB-BROADBAND-AS Sky UK Limited | 6.4M | 2.8M | 79 |
| AS786GB | JANET - Jisc Services Limited | 7M | 1.7M | 219 |
| AS13285GB | OPALTELECOM-AS TalkTalk Communications Limited | 7.7M | 3.3M | 99 |
| AS2856GB | BT-UK-AS British Telecommunications Limited | 18.4M | 8.9M | 544 |
| AS5089GB | NTL Virgin Media Limited | 23M | 8.5M | 289 |