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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 | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 976.9K | 4,012 |
| — |
| 178 |
| 13 |
| AS58052GB | VOLTERIC Volteric Limited | — | 1 | 1 |
| AS200371GB | freedomsatuk Bentley-Walker Limited | — | 1 | 1 |
| AS205648GB | VirgoCube_Limited VirgoCube Limited | — | 256 | 1 |
| AS47509GB | WT70-AS Wai-Wah Tang | — | 20 | 12 |
| AS213729GB | RikkiNet Rikki Network Limited | — | 1 | 1 |
| AS213897GB | BUBBLES-AS BUBBLES ALTER LIMITED | — | 1 | 1 |
| AS206000GB | HRE Harry Rowan Elenor | — | 258 | 3 |
| AS17626GB | YNL-AS-AP - Yasuda Network LTD | — | 1 | 1 |
| AS202751GB | BGP_AS Christopher Edwards | — | 1 | 1 |
| AS215768GB | Infected-Systems Alex Haydock | — | 1 | 1 |
| AS200800GB | ZURGANF-AS Zurganf Ltd | — | 1 | 1 |
| AS200104GB | crow You are never Limited | — | 4.1K | 1 |
| AS197378GB | ZYME Zyme Limited | — | 1 | 1 |
| AS209507GB | REALLY-AWESOME-TECHNOLOGY Really Awesome Technology LTD | — | 1 | 1 |
| AS204931GB | PNOSOLUTIONS-AS PNO Solutions Limited | — | 8 | 2 |
| AS214457GB | veesix-networks Veesix Networks Ltd | — | 524.3K | 1 |
| AS201616GB | theoh-as Theo Holroyd | — | 2 | 2 |
| AS208485GB | PINHOUSE-AS PINHOUSE LIMITED | — | 1 | 1 |
| AS203873GB | HEX-NETWORK Alexander Berry-Roe | — | 288 | 3 |
| AS207529GB | NyanLoliNetwork NYANLOLI LTD | — | 67 | 19 |
| AS204725GB | luna-frankland Luna Frankland | — | 2 | 2 |
| AS214592GB | GLADELIGHT Gladelight Limited | — | 17 | 2 |
| AS209606GB | BEYONDORBIT Beyond Orbit Ltd. | — | 3 | 3 |
| AS59920GB | LUSORY Lusory Limited | — | 1 | 1 |
| AS202076GB | SCOTTISHFIBRE Fibre Networks (Scotland) Limited | — | 21 | 3 |
| AS200299GB | BASESERV-AS BaseServ Limited | — | 1 | 1 |
| AS214731GB | ETO-AS ETO Networks Limited | — | 633 | 43 |
| AS214749GB | PAW James Cahill | — | 6 | 6 |
| AS203504GB | Tomas-Freitas-Fernandes Tomas Freitas Fernandes | — | 4 | 4 |
| AS213262GB | Moe-Network Moe Overflow Electric Limited | — | 21 | 5 |
| AS211879GB | NJRYCE Nicholas Ryce | — | 1 | 1 |
| AS40550GB | IIX-GTIIX-RS - IX Reach Ltd | — | — | 0 |
| AS210683GB | syo Syo.io Limited | — | 1 | 1 |
| AS212437GB | ADL ADT Defence Limited | — | 524.3K | 1 |
| AS204446GB | HELLOMOUSE Hellomouse Ltd | — | 5 | 5 |
| AS47326GB | KTT-CARRIER-ASN KTT Carrier Limited | — | 65.6K | 3 |
| AS34202GB | CLOUVIDER-THN2 Clouvider Limited | — | 1 | 1 |
| AS206792GB | ZACH Zachary Buller | — | 16 | 1 |
| AS59893GB | FRC-AS Free Range Cloud Ltd. | — | 4 | 4 |
| AS211035GB | PHANTOM-HIVE-AS PHANTOM HIVE NETWORK LTD | — | 17 | 17 |
| AS58148GB | IRONSIDE Ironside Systems Ltd. | — | 1 | 1 |
| AS61126GB | ROUTED Lee Valentine | — | 3 | 3 |
| AS200365GB | Possibly-Lizards Possibly Lizards Limited | — | 257 | 2 |
| AS213650GB | CDNINFRA-AS CDN Infra Limited | — | 272 | 2 |
| AS216055GB | blue Wren Olivia Wood | — | 1 | 1 |
| AS49134GB | AS_10VPN 10VPN Research Network LTD | — | 22 | 4 |