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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.
3,143 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 172 |
| AS212238GB | CDNEXT Datacamp Limited | 1.2M | 4,613 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 404 |
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| AS206848GB | UKCDN Clouvider Limited | — | 256 | 1 |
| AS64474GB | ASN-IITSS IT Support Services Team Limited | — | 3 | 3 |
| AS218671GB | WALKOWSKI-AS Lukasz Walkowski | — | 1 | 1 |
| AS206877GB | SharedGrid SharedGrid Ltd | — | 1 | 1 |
| AS214931GB | ALUE-NET ALUE LTD | — | 1 | 1 |
| AS201616GB | theoh-as Theo Holroyd | — | 2 | 2 |
| AS218744GB | AYDAN-AS Aydan Abrahams | — | 1 | 1 |
| AS29478GB | JUNESTA Karl Dyson | — | 2 | 2 |
| AS206000GB | HRE Harry Rowan Elenor | — | 259 | 4 |
| AS200671GB | START-AS START BUILDING LTD | — | 1 | 1 |
| AS209022GB | Tschajera-Limited Tschajera Limited | — | 4.1K | 16 |
| AS207965GB | ETIENNE-LABAUME ETIENNE LABAUME | — | 13 | 3 |
| AS57155GB | COAST805-AS Contingency Networks Ltd | — | — | 0 |
| AS219467GB | SUYOU-NET SUYOU VPN LIMITED | — | — | 0 |
| AS218418GB | NINEONE-IXP 91TELECOM LTD | — | — | 0 |
| AS214457GB | veesix-networks Veesix Networks Ltd | — | — | 0 |
| AS213803GB | AS-Xray Xray Network Ltd | — | — | 0 |
| AS212902GB | KKL Kustom Konsulting Limited | — | — | 0 |
| AS218194GB | TENGIGCLOUD-AS 10GCLOUD LTD | — | — | 0 |
| AS216179GB | NATE-BILL Nathaniel Bill | — | — | 0 |
| AS213074GB | IPXO-Testing-ASN Internet Utilities Europe and Asia Limited | — | — | 0 |
| AS211900GB | IN8INITY IN8INITY GLOBAL LIMITED | — | — | 0 |
| AS211108GB | RGA RGA UK SERVICES LIMITED | — | — | 0 |
| AS199227GB | Protocol7-IX JIANYUELAB LTD | — | — | 0 |
| AS197958GB | Ogilvie-Communications NET DEFENCE LIMITED | — | — | 0 |
| AS62249GB | NR-UK-AS Network Rail Infrastructure Limited | — | — | 0 |
| AS214514GB | HENRYCLARKE Henry Clarke | — | 16 | 1 |
| AS206925GB | CentralNic-GRX-A CentralNic Ltd | — | — | 0 |
| AS197360GB | HQ-24Ping-Ltd 24Ping Ltd. | — | — | 0 |
| AS56533GB | NetCracker-AS Netcracker Technology EMEA Limited | — | — | 0 |
| AS52167GB | BANDWIDTH-USA Hydra Communications Ltd | — | — | 0 |
| AS40986GB | YAHOO1-AS Yahoo-UK Limited | — | — | 0 |
| AS35433GB | Zzoomm Full Fibre Limited | — | — | 0 |
| AS31402GB | BlueSquare Rank Digital Limited | — | — | 0 |
| AS15636GB | COLLINGWOOD Collingwood Business Solutions Limited | — | — | 0 |
| AS12606GB | EASYNET-NL GTT - EMEA Ltd. | — | — | 0 |
| AS35788GB | Forcepoint-Cloud-AMER-AS Forcepoint UK Limited | — | — | 0 |
| AS208886GB | RIPL-AS Rhodes Island Pharmaceutical Ltd | — | — | 0 |
| AS208723GB | VDX-SYSTEMS VDX SYSTEMS LTD | — | — | 0 |