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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 | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 968.4K | 3,979 |
| 256 |
| — |
| 1 |
| AS39715GB | platinumhedgehog PLATINUM HEDGEHOG CONSULTANCY LIMITED | 256 | — | 1 |
| AS203133GB | Optimas_UK Optimas OE Solutions LTD | 256 | — | 1 |
| AS200425GB | BG-TAL Genius Sports UK Limited | 256 | 65.5K | 2 |
| AS42330GB | UNCHAINEDISP Unchained ISP Limited | 256 | 1 | 2 |
| AS204942GB | MifiNorx-AS MIFINORX LTD | 256 | — | 1 |
| AS199330GB | CENTRALNIC-ANYCAST-A CentralNic Ltd | 256 | 1 | 2 |
| AS201353GB | CuTEL Matthew Harrold | 256 | 1 | 2 |
| AS60977GB | NVIDIA-NGN NVIDIA Ltd | 256 | — | 1 |
| AS201738GB | UFO-TECHNOLOGIES-LIMITED UFO TECHNOLOGIES LIMITED | 256 | — | 1 |
| AS215497GB | Tivarri Tivarri Limited | 256 | — | 1 |
| AS204776GB | Mintopia Jessica Smith | 256 | 257 | 3 |
| AS34675GB | PIH-UK Prima Internet Holdings Limited | 256 | — | 1 |
| AS197173GB | HIGHLIGHT-NET HIGHLIGHT APPS LTD | 256 | — | 1 |
| AS202141GB | HALLHOST-AS Warren Hall | 256 | — | 1 |
| AS200304GB | Everyday-Communications Everyday Communications LTD | 256 | — | 1 |
| AS15992GB | VISA-EUROPE Visa Europe Limited | 256 | — | 1 |
| AS203961GB | CentralNic-Anycast-G CentralNic Ltd | 256 | 1 | 2 |
| AS206033GB | REPOXLABS Repox Labs Ltd | 256 | 3 | 4 |
| AS199738GB | VATORA VATORA LIMITED | 256 | 65.5K | 2 |
| AS211142GB | as_gaussmanltd CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS3220GB | INTERNET-TECHNOLOGY-ADVISORS Internet Technology Advisors Scandinavia Ab | 256 | — | 1 |
| AS205237GB | SAVILLS-PLC SAVILLS PLC | 256 | — | 1 |
| AS201375GB | NG-MKDC0 Datazero Ltd. | 256 | — | 1 |
| AS49209GB | CTE-ASN China Telecom Europe Ltd. | 256 | — | 1 |
| AS24894GB | TAGWORLDWIDE Tag Europe Ltd | 256 | — | 1 |
| AS198628GB | FIDESSA-AS FIDESSA TRADING UK LIMITED | 256 | — | 1 |
| AS200950GB | CalibourNetwork Calibour Limited | 256 | 817 | 8 |
| AS208150GB | uk-eagle Eagle Aquila Ltd | 256 | — | 1 |
| AS211409GB | PrimeFilter FoxiBytes LTD | 256 | — | 1 |
| AS59783GB | SBIX-DUS ONESAVINGS BANK PLC | 256 | — | 1 |
| AS41612GB | REDBEE-AS Red Bee Media Limited | 256 | — | 1 |
| AS199535GB | com Bet Invest LTD | 256 | — | 1 |
| AS201230GB | PENINSULA-AS Peninsula Business Services Ltd | 256 | — | 1 |
| AS200468GB | ALVAREZ ALVAREZ & MARSAL DISPUTES AND INVESTIGATIONS LLP | 256 | — | 1 |
| AS202529GB | CDW-UK-IT-ASN CDW Ltd | 256 | — | 1 |
| AS49978GB | IXARIS NIUM SYSTEMS UK LIMITED | 256 | — | 1 |
| AS59902GB | Frankfurt IQVIA SOLUTIONS HQ LTD | 256 | — | 1 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |
| AS209750GB | MBX-AS MBX DIGITAL LIMITED | 256 | — | 1 |
| AS199129GB | DIRECTCONNECT-AS Direct Connect (ISP) Ltd | 256 | — | 1 |
| AS198741GB | AMELIAK Amelia Kalinowska | 256 | 1 | 2 |
| AS215661GB | ANIXNICS ANIXNICS LIMITED | 256 | — | 1 |
| AS202808GB | LOGIENET Blairlogie Community and Heritage Trust | 256 | — | 1 |
| AS203001GB | GateX GateX LIMITED | 256 | 1 | 2 |
| AS205615GB | SSC SS&C Solution Limited | 256 | — | 1 |
| AS202792GB | CLOUD-TRANSIT Clouvider Limited | 256 | — | 1 |