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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 |
| 256 |
| 65.8K |
| 19 |
| AS203403GB | Flextel Flextel Limited | 256 | — | 1 |
| AS213016GB | holker-network-solutions Holker Network Solutions Ltd | 256 | — | 1 |
| AS213119GB | ALZ-SOFTWARE-AS ALZ Software Ltd | 256 | — | 1 |
| AS204519GB | KORPTRADE-AS SL029315 LP | 256 | — | 1 |
| AS201304GB | CENTRALNIC-ANYCAST-E CentralNic Ltd | 256 | 1 | 2 |
| AS211120GB | as_grootwebhost CARDOCK HOSTING LIMITED | 256 | — | 1 |
| AS202306GB | HOSTGLOBALPLUS-AS HOSTGLOBAL.PLUS LTD | 256 | 17 | 3 |
| AS209635GB | RedMatter-Internal Red Matter Limited | 256 | 1 | 2 |
| AS211409GB | PrimeFilter FoxiBytes LTD | 256 | — | 1 |
| AS204826GB | NR-EU-MA3 North Rock Capital Management (UK) LLP | 256 | — | 1 |
| AS199764GB | EA-RO-BUC Electronic Arts Limited | 256 | — | 1 |
| AS207089GB | uk-itsystems IT Systems & Support Limited | 256 | 524.3K | 2 |
| AS60431GB | PNO-AS PNO Solutions Limited | 256 | 49 | 5 |
| AS211198GB | WHITESPIDER WhiteSpider Enterprise Services Limited | 256 | — | 1 |
| AS47426GB | ADVITEL-AS Advitel Ltd | 256 | 1 | 2 |
| AS208393GB | DEDCLOUD Dedcloud Network Ltd | 256 | 2 | 3 |
| AS209870GB | Cylo Cylo Ltd | 256 | — | 1 |
| AS59660GB | DATAART-RDC DataArt Technologies UK Ltd | 256 | — | 1 |
| AS200473GB | Samsung-MSK-AS Samsung SDS Europe Ltd | 256 | — | 1 |
| AS44516GB | CTENET China Telecom Europe Ltd. | 256 | — | 1 |
| AS34611GB | Mystere Matthew Southgate | 256 | — | 1 |
| AS198353GB | MIMEO-AS Mimeo Limited | 256 | — | 1 |
| AS58007GB | Witine Witine Limited | 256 | — | 1 |
| AS204539GB | AXIC-Axivora-Connect-Ltd Axivora Connect LtD | 256 | 77 | 18 |
| AS33879GB | FORTHS-PORTS-PLC Forth Ports Public Limited Company | 256 | — | 1 |
| AS200304GB | Everyday-Communications Everyday Communications LTD | 256 | — | 1 |
| AS50108GB | EA-UK-BIR Electronic Arts Limited | 256 | — | 1 |
| AS203109GB | ORG-AL1060-RIPE AeroFibre Ltd | 256 | — | 1 |
| AS207477GB | PEACHY PEACHY SERVERS LIMITED | 256 | 65.5K | 2 |
| AS60914GB | TelecomsConsortiumLtd Telecoms Consortium Ltd. | 256 | — | 1 |
| AS41380GB | ALD-AS Ald Automotive Ltd | 256 | — | 1 |
| AS214188GB | VoltHosting VoltHosting Ltd | 256 | 256 | 2 |
| AS209669GB | PRIMONET-AS Ashley Primo | 256 | 3 | 4 |
| AS16238GB | TELECOM2-AS Telecom2 Ltd. | 256 | — | 1 |
| AS212781GB | Hypercon Hypercon Ltd | 256 | — | 1 |
| AS202529GB | CDW-UK-IT-ASN CDW Ltd | 256 | — | 1 |
| AS209220GB | AblativeHosting Ablative Hosting Ltd | 256 | 1 | 2 |
| AS199738GB | VATORA VATORA LIMITED | 256 | 65.5K | 2 |
| AS213565GB | Badonde-Networks David Davies | 256 | 65.5K | 3 |
| AS214670GB | NOMETRIC-NET No Metric Limited | 256 | 131.1K | 3 |
| AS49978GB | IXARIS NIUM SYSTEMS UK LIMITED | 256 | — | 1 |
| AS201375GB | NG-MKDC0 Datazero Ltd. | 256 | — | 1 |
| AS212124GB | UPMIND Upmind Automation Limited | 256 | — | 1 |
| AS39461GB | BE-AS EDF ENERGY NUCLEAR GENERATION LIMITED | 256 | — | 1 |
| AS211437GB | SurlyNet Gareth Woolridge | 256 | 16 | 2 |
| AS213150GB | INDIGO-SYS Laurence White | 256 | 524.3K | 2 |