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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 |
| 256 |
| — |
| 1 |
| AS204055GB | CentralNic-Anycast-H CentralNic Ltd | 256 | 1 | 2 |
| AS209220GB | AblativeHosting Ablative Hosting Ltd | 256 | 1 | 2 |
| AS214064GB | Kevin-Titmarsh Kevin Titmarsh | 256 | 1 | 2 |
| AS218950GB | VYTAL VYTAL TECHNOLOGY LTD | 256 | — | 1 |
| AS203001GB | GateX GateX LIMITED | 256 | 1 | 2 |
| AS49781GB | b4rk Broadband for Rural Kent Ltd | 256 | — | 1 |
| AS47578GB | PRT-ANYCAST PRT Systems Limited | 256 | 1 | 2 |
| AS198243GB | GlobalEntry-AS GLOBAL ENTRY SOLUTIONS LTD | 256 | — | 1 |
| AS198981GB | NETSHIELD-BYOIP NETSHIELD LTD | 256 | 4.1K | 2 |
| AS203108GB | iTouchVision iTouch Vision LTD | 256 | — | 1 |
| AS219245GB | DECENTRALIA-ASN DECENTRALIA LIMITED | 256 | — | 1 |
| AS212781GB | Hypercon Hypercon Ltd | 256 | — | 1 |
| AS214451GB | R3ido101 Oliver Reid | 256 | 131.1K | 3 |
| AS51303GB | Warsaw IQVIA SOLUTIONS HQ LTD | 256 | — | 1 |
| AS198472GB | MANCHESTER-CC-AS Manchester City Council | 256 | — | 1 |
| AS209503GB | Zentyx Zentyx Limited | 256 | — | 1 |
| AS43079GB | Matchtech MATCHTECH GROUP (UK) LIMITED | 256 | — | 1 |
| AS56438GB | LOOPSCORPIO-AS Loop Scorpio Ltd | 256 | — | 1 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |
| AS200104GB | crow PETALDATA LTD | 256 | 1 | 2 |
| AS215636GB | NUSO-FRA NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS204757GB | ReactiveMarkets Reactive Markets Limited | 256 | — | 1 |
| AS206773GB | MSXI MSX International Ltd | 256 | — | 1 |
| AS198231GB | SIXNET Sixnet Operation Ltd | 256 | — | 1 |
| AS49882GB | SKRILL Paysafe Holdings UK Limited | 256 | — | 1 |
| AS198466GB | MORBY J. MORBY | 256 | — | 1 |
| AS58117GB | TOUCHTEC TouchTec Technology Limited | 256 | — | 1 |
| AS33879GB | FORTHS-PORTS-PLC Forth Ports Public Limited Company | 256 | — | 1 |
| AS211188GB | ASBTSLTD Business Teleports and Solutions Limited | 256 | — | 1 |
| AS209015GB | TenTime-AS Ten Time Limited | 256 | — | 1 |
| AS200425GB | BG-TAL Genius Sports UK Limited | 256 | 65.5K | 2 |
| AS21160GB | ASN-MARKEL Markel International Services Ltd | 256 | — | 1 |
| AS198219GB | CHARLIE-AS Charlie Camilleri | 256 | 10 | 4 |
| AS209080GB | ASN-EDFMAN E D & F MAN TECHNOLOGY LIMITED | 256 | — | 1 |
| AS198892GB | MIXCLOUD-AS MIXCLOUD LTD | 256 | — | 1 |
| AS218393GB | FSL-SOFTWARE FSL Software Ltd | 256 | — | 1 |
| AS200581GB | TFWFIBRE-ASN TfW Fibre Ltd | 256 | 524.3K | 2 |
| AS219412GB | Oxiwave-Internet Lewis Brown | 256 | 70.3K | 26 |
| AS204519GB | KORPTRADE-AS SL029315 LP | 256 | — | 1 |
| AS57477GB | monsternet Monsternet Highland Ltd | 256 | — | 1 |
| AS213150GB | INDIGO-SYS Laurence White | 256 | 524.3K | 2 |
| AS211855GB | FRAMES In The Frame (Manchester) Ltd | 256 | — | 1 |
| AS219317GB | UGN-BILISIM UGN BILISIM INTERNET HIZMETLERI LTD | 256 | — | 1 |
| AS204826GB | NR-EU-MA3 North Rock Capital Management (UK) LLP | 256 | — | 1 |
| AS207155GB | STORMNET Stormnet Hosting LTD | 256 | 1 | 2 |
| AS47744GB | ANNECTO-AS ANNECTO TELECOM LIMITED | 256 | — | 1 |