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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 |
| 1 |
| 2 |
| AS50108GB | EA-UK-BIR Electronic Arts Limited | 256 | — | 1 |
| AS202590GB | HACKLAB Edinburgh Hacklab Ltd | 256 | 1 | 2 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |
| AS43079GB | Matchtech MATCHTECH GROUP (UK) LIMITED | 256 | — | 1 |
| AS47935GB | QUANTUMUK-AS Quantum Communications Ltd | 256 | 65.5K | 2 |
| AS218280GB | HILDREY-NET Stephen Hildrey | 256 | 1 | 2 |
| AS47988GB | PHOTOSOFPICKLES Charles Allom | 256 | 1 | 2 |
| AS212781GB | Hypercon Hypercon Ltd | 256 | — | 1 |
| AS28934GB | MIZUHO-AS Mizuho International Plc | 256 | — | 1 |
| AS211855GB | FRAMES In The Frame (Manchester) Ltd | 256 | — | 1 |
| AS204757GB | ReactiveMarkets Reactive Markets Limited | 256 | — | 1 |
| AS197106GB | TRPI-EU-AS T. Rowe Price International LTD | 256 | — | 1 |
| AS218462GB | NOTBADHOSTING NOTBAD HOSTING LTD | 256 | — | 1 |
| AS215252GB | LANTEC-AS Lantec Services Ltd | 256 | 1 | 2 |
| AS48706GB | EDP KERRIDGE COMMERCIAL SYSTEMS (KSH) LIMITED | 256 | — | 1 |
| AS203108GB | iTouchVision iTouch Vision LTD | 256 | — | 1 |
| AS218703GB | Tempest TEMPEST OPERATIONS UK LTD | 256 | — | 1 |
| AS204055GB | CentralNic-Anycast-H CentralNic Ltd | 256 | 1 | 2 |
| AS60698GB | LINXNETWORKS Linx-Networks-UK Ltd | 256 | — | 1 |
| AS21160GB | ASN-MARKEL Markel International Services Ltd | 256 | — | 1 |
| AS214731GB | ETO-AS ETO Networks Limited | 256 | 887 | 43 |
| AS218393GB | FSL-SOFTWARE FSL Software Ltd | 256 | — | 1 |
| AS204293GB | TinyHomeLab TinyHomeLab Ltd | 256 | 1 | 2 |
| AS204826GB | NR-EU-MA3 North Rock Capital Management (UK) LLP | 256 | — | 1 |
| AS202783GB | SWANN-MNT NHS National Services Scotland | 256 | — | 1 |
| AS204942GB | MifiNorx-AS MIFINORX LTD | 256 | — | 1 |
| AS197576GB | zumbak ZUMBAK LTD | 256 | — | 1 |
| AS215636GB | NUSO-FRA NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS206987GB | MARCUSNAW Marcus Nawrocki | 256 | — | 1 |
| AS198466GB | MORBY J. MORBY | 256 | — | 1 |
| AS212031GB | BITSolutions-AS BIT Solutions Ltd | 256 | — | 1 |
| AS219245GB | DECENTRALIA-ASN DECENTRALIA LIMITED | 256 | — | 1 |
| AS202587GB | UMOJA-AS C2C Ltd | 256 | — | 1 |
| AS205936GB | ASCOULDIT COULD IT HOSTING LIMITED | 256 | — | 1 |
| AS218950GB | VYTAL VYTAL TECHNOLOGY LTD | 256 | — | 1 |
| AS47744GB | ANNECTO-AS ANNECTO TELECOM LIMITED | 256 | — | 1 |
| AS209503GB | Zentyx Zentyx Limited | 256 | — | 1 |
| AS198981GB | NETSHIELD-BYOIP NETSHIELD LTD | 256 | 4.1K | 2 |
| AS200708GB | PROTEUS-AS Hugo Rodrigues Da Costa | 256 | 1 | 2 |
| AS200425GB | BG-TAL Genius Sports UK Limited | 256 | 65.5K | 2 |
| AS57477GB | monsternet Monsternet Highland Ltd | 256 | — | 1 |
| AS209220GB | AblativeHosting Ablative Hosting Ltd | 256 | 1 | 2 |
| AS206981GB | TeritumDevelopment Christopher Mountford | 256 | 1 | 2 |
| AS198231GB | SIXNET Sixnet Operation Ltd | 256 | — | 1 |
| AS204778GB | PaulLewis Paul Nicholas Lewis | 256 | 1 | 2 |
| AS41373GB | BT-Plc NATIONAL HEALTH SERVICE | 256 | — | 1 |