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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 |
| 1 |
| AS205058GB | MAEEKO MAGICAL NETWORK LIMITED | — | 5 | 4 |
| AS213982GB | DISTRICTB-AS Callum Bennett | — | 17 | 2 |
| AS34202GB | CLOUVIDER-THN2 Clouvider Limited | — | 1 | 1 |
| AS203766GB | AWILLS Andrew Wills | — | 1 | 1 |
| AS48961GB | WarwickNet Glide Student & Residential Limited | — | 65.5K | 1 |
| AS211224GB | JB3 Joseph Banks | — | 17 | 2 |
| AS209606GB | BEYONDORBIT Beyond Orbit Ltd. | — | 3 | 3 |
| AS214592GB | GLADELIGHT Gladelight Limited | — | 17 | 2 |
| AS56802GB | DPKGSOFT-AS DpkgSoft International Limited | — | 1 | 1 |
| AS210683GB | syo Syo Limited | — | 1 | 1 |
| AS200707GB | APPMAIL Integrated Digital Services Ltd | — | 65.5K | 1 |
| AS218843GB | OMNIVISION-INTERNET-GATEWAY Omnivision Solutions Ltd | — | 339 | 9 |
| AS202194GB | HORDEN-ENGINEERING Horden Engineering Limited | — | 1 | 1 |
| AS211879GB | NJRYCE Nicholas Ryce | — | 1 | 1 |
| AS43336GB | ASPIXIE PIXIE NETWORKS LTD | — | 524.3K | 1 |
| AS57110GB | AARAN-CLOUD-AS Aaran Perry | — | 257 | 2 |
| AS214160GB | SHREE Shreejal Maharjan | — | 3 | 3 |
| AS35196GB | IH-TRANSIT-AS FIRST SERVER LIMITED | — | 1 | 1 |
| AS219157GB | SHRDSERV Global Capital Services Ltd. | — | 65.8K | 4 |
| AS58285GB | ASSIXOP Sixnet Operation Ltd | — | 10.6M | 256 |
| AS204994GB | BAHAMUT-ZONE Luke Seabrook | — | 1 | 1 |
| AS198741GB | AMELIAK Amelia Kalinowska | — | 1 | 1 |
| AS215363GB | Wles Wles Technologies Ltd | — | 257 | 2 |
| AS207890GB | Intefluent Andrew Williams | — | 17 | 2 |
| AS56367GB | ALUE-NET ALUE LTD | — | 2 | 2 |
| AS207529GB | NyanLoliNetwork NYANLOLI LTD | — | 571 | 12 |
| AS214168GB | SIXMANCHESTER Sixnet Operation Ltd | — | 65.5K | 1 |
| AS203504GB | Tomas-Freitas-Fernandes Tomas Freitas Fernandes | — | 2 | 2 |
| AS202235GB | CSD-COMMS UK On-line Agri-sales Limited | — | 65.5K | 1 |
| AS216157GB | SIXNET-OP Sixnet Operation Ltd | — | 65.5K | 1 |
| AS203873GB | HEX-NETWORK Alexander Berry-Roe | — | 288 | 3 |
| AS197239GB | ClearNet HyperLXC Medical Ltd | — | 1 | 1 |
| AS212806GB | stratagem VeloxServ Communications Ltd | — | 64 | 1 |
| AS204946GB | GUFFNET ABSOLUTE GUFF LTD | — | 1 | 1 |
| AS219457GB | Zephyrbash-Labs Evan Galvin | — | 1 | 1 |
| AS218495GB | mindspit Rhys Jenkins | — | 2 | 2 |
| AS41255GB | Alanyhq-Networks-AS Alanyhq Networks Limited | — | 1 | 1 |
| AS206000GB | HRE Harry Rowan Elenor | — | 259 | 4 |
| AS200671GB | START-AS START BUILDING LTD | — | 1 | 1 |
| AS201335GB | SEVENNET-UK Seven Networking UK Ltd | — | 4 | 4 |
| AS213897GB | BUBBLES-AS BUBBLES ALTER LIMITED | — | 1 | 1 |
| AS218744GB | AYDAN-AS Aydan Abrahams | — | 1 | 1 |
| AS208699GB | ParsnsNetwork Leo Shum | — | 8 | 5 |
| AS213210GB | kingslanding-as Richard-Connon | — | 1 | 1 |
| AS209771GB | SYSN SYSN LTD | — | 5 | 5 |
| AS200493GB | WHITEQUARK-AS Ekaterina Zotova | — | 1 | 1 |