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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 |
| — |
| 65.5K |
| 1 |
| AS216126GB | James-Ledger James Ledger | — | 13 | 13 |
| AS209507GB | REALLY-AWESOME-TECHNOLOGY Really Awesome Technology LTD | — | 1 | 1 |
| AS199804GB | TFES-AS THE FIRST EAST STAR LTD | — | 1 | 1 |
| AS215499GB | richard-franks Richard Franks | — | 1 | 1 |
| AS214514GB | HENRYCLARKE Henry Clarke | — | 16 | 1 |
| AS198657GB | GOHEGAN-NET Kai Gohegan | — | 257 | 2 |
| AS64474GB | ASN-IITSS IT Support Services Team Limited | — | 3 | 3 |
| AS203504GB | Tomas-Freitas-Fernandes Tomas Freitas Fernandes | — | 2 | 2 |
| AS17626GB | YNL-AS-AP - Yasuda Network LTD | — | 1 | 1 |
| AS58148GB | IRONSIDE Ironside Systems Ltd. | — | 1 | 1 |
| AS215368GB | CONNORMCF Connor McFarlane | — | 1 | 1 |
| AS209601GB | XiaoYuanNET XiaoYuan Networks Limited | — | 6 | 6 |
| AS198276GB | ARPERLA Jordan Robert | — | 2 | 2 |
| AS201616GB | theoh-as Theo Holroyd | — | 2 | 2 |
| AS213210GB | kingslanding-as Richard-Connon | — | 1 | 1 |
| AS214931GB | ALUE-NET ALUE LTD | — | 1 | 1 |
| AS218212GB | GuernseyOnline Hosting Ltd. | — | 1 | 1 |
| AS209771GB | SYSN SYSN LTD | — | 5 | 5 |
| AS201164GB | Cool-Studio Cool Studio Limited | — | 257 | 2 |
| AS202235GB | CSD-COMMS UK On-line Agri-sales Limited | — | 65.5K | 1 |
| AS214749GB | PAW James Cahill | — | 6 | 6 |
| AS47509GB | WT70-AS Wai-Wah Tang | — | 28 | 16 |
| AS200455GB | HOTARU-AS HOTARU NETWORK LTD. | — | 162 | 12 |
| AS213626GB | BIONIC-NETWORK Bionic.Network Ltd | — | 2 | 2 |
| AS219494GB | HACKWORTH_UK_2 Hackworth Ltd | — | 2 | 2 |
| AS213650GB | CDNINFRA-AS CDN Infra Limited | — | 16 | 1 |
| AS200365GB | Possibly-Lizards Possibly Lizards Limited | — | 257 | 2 |
| AS218744GB | AYDAN-AS Aydan Abrahams | — | 1 | 1 |
| AS58339GB | MARIA-AS MARIA STYLE LTD | — | 1.4K | 33 |
| AS29478GB | JUNESTA Karl Dyson | — | 2 | 2 |
| AS216055GB | blue Wren Olivia Wood | — | 1 | 1 |
| AS148971GB | KEIBIIN-AS-AP - Keibiin's Holdings Limited | — | 313 | 13 |
| AS199686GB | aaroncarson Aaron Carson | — | 18 | 3 |
| AS205474GB | CARR Jack Carr | — | 1 | 1 |
| AS56758GB | CR0BAR Cr0bar Limited | — | 6 | 6 |
| AS218940GB | KUMO2 Tealight Ltd | — | 1 | 1 |
| AS213262GB | Moe-Network Moe Overflow Electric Limited | — | 22 | 6 |
| AS206202GB | NAMESERVERPARTY-AS Faelix Limited | — | 1 | 1 |
| AS48961GB | WarwickNet Glide Student & Residential Limited | — | 65.5K | 1 |
| AS201824GB | stat-cons-as STAT CONSULTING LTD | — | 1 | 1 |
| AS200671GB | START-AS START BUILDING LTD | — | 1 | 1 |
| AS201335GB | SEVENNET-UK Seven Networking UK Ltd | — | 4 | 4 |
| AS47326GB | KTT-CARRIER-ASN KTT Carrier Limited | — | 65.6K | 3 |
| AS35196GB | IH-TRANSIT-AS FIRST SERVER LIMITED | — | 1 | 1 |
| AS209022GB | Tschajera-Limited Tschajera Limited | — | 4.1K | 16 |
| AS215754GB | FIBREWAVE-CUST Fiberwave Broadband Ltd | — | 4.1K | 1 |