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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 |
| 1 |
| 2 |
| AS204778GB | PaulLewis Paul Nicholas Lewis | 256 | 1 | 2 |
| AS198222GB | WHC-AS West Herts College | 256 | — | 1 |
| AS212486GB | kigen KIGEN (UK) LIMITED | 256 | — | 1 |
| AS207273GB | PHAROAH-AS Pharoah Tools Limited | 256 | — | 1 |
| AS212781GB | Hypercon Hypercon Ltd | 256 | — | 1 |
| AS42046GB | ITN Independent Television News Limited | 256 | — | 1 |
| AS208563GB | LINUXGEMINI CodeReactor Limited | 256 | 256 | 2 |
| AS199548GB | as_fnt_prm UrSolutions Ltd | 256 | — | 1 |
| AS214315GB | CUSHWAKE-IRE Cushman & Wakefield Debenham Tie Leung Limited | 256 | — | 1 |
| AS210025GB | XXSL Alice Cat Research Ltd | 256 | 10 | 11 |
| AS216036GB | TOTALCOMMS-AS Signal Telecom Ltd | 256 | — | 1 |
| AS207601GB | EA-FR-LYON Electronic Arts Limited | 256 | — | 1 |
| AS150325GB | TSUKUDANI-NETWORK - TSUKUDANI NETWORK | 256 | 4 | 5 |
| AS29048GB | EQUIDUCT Equiduct Systems Limited | 256 | — | 1 |
| AS30894GB | SINCH-MBLOX-AS SINCH UK LTD. | 256 | — | 1 |
| AS198801GB | YOUR-HOUSING-GROUP-AS Your Housing Group Ltd | 256 | — | 1 |
| AS209080GB | ASN-EDFMAN E D & F MAN TECHNOLOGY LIMITED | 256 | — | 1 |
| AS213436GB | NIUZI_DADA_CLOUD NIUZI DADA CLOUD LIMITED | 256 | 4.9K | 8 |
| AS205615GB | SSC SS&C Solution Limited | 256 | — | 1 |
| AS212880GB | AS-LLTN-RIPE Rydal Communications Ltd | 256 | — | 1 |
| AS215915GB | DEEPGREEN Deep Green Technologies Ltd | 256 | — | 1 |
| AS209635GB | RedMatter-Internal Red Matter Limited | 256 | 1 | 2 |
| AS214670GB | NOMETRIC-NET No Metric Limited | 256 | 131.1K | 3 |
| AS59902GB | Frankfurt IQVIA SOLUTIONS HQ LTD | 256 | — | 1 |
| AS202532GB | MBYTECHNOLOGY Mbytechnology Limited | 256 | — | 1 |
| AS3220GB | INTERNET-TECHNOLOGY-ADVISORS Internet Technology Advisors Scandinavia Ab | 256 | — | 1 |
| AS41493GB | CHI-X Cboe Europe Limited | 256 | — | 1 |
| AS215322GB | connectcov UK Dedicated Servers Limited | 256 | 65.5K | 2 |
| AS213692GB | CSCM CSCM Limited | 256 | 524.3K | 2 |
| AS200251GB | cwg Cineworld Cinemas Limited | 256 | — | 1 |
| AS204826GB | NR-EU-MA3 North Rock Capital Management (UK) LLP | 256 | — | 1 |
| AS212729GB | ERL Everlight Radiology Limited | 256 | — | 1 |
| AS12628GB | SCREAMING-NET-AS JACO ENGELBRECHT | 256 | 1 | 2 |
| AS42044GB | CENTRALNIC CentralNic Ltd | 256 | 1 | 2 |
| AS57770GB | ECHOINTERNET Echo Internet Limited | 256 | — | 1 |
| AS198789GB | AS_SPEEDY Speedy IP Services LTD | 256 | — | 1 |
| AS204318GB | BGPTOOLS-QA Benjamin Cartwright-Cox | 256 | 82.1K | 208 |
| AS50985GB | EA-UK-RUN Electronic Arts Limited | 256 | — | 1 |
| AS20679GB | HSO Syntura Group Limited | 256 | 1 | 2 |
| AS213000GB | ASAML Alliance Medical Limited | 256 | — | 1 |
| AS198243GB | GlobalEntry-AS GLOBAL ENTRY SOLUTIONS LTD | 256 | — | 1 |
| AS204519GB | KORPTRADE-AS SL029315 LP | 256 | — | 1 |
| AS200473GB | Samsung-MSK-AS Samsung SDS Europe Ltd | 256 | — | 1 |
| AS216265GB | ARISTO-NET ARISTO NETWORKS LTD | 256 | 1 | 2 |
| AS198353GB | MIMEO-AS Mimeo Limited | 256 | — | 1 |
| AS197106GB | TRPI-EU-AS T. Rowe Price International LTD | 256 | — | 1 |