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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 | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
| 256 |
| — |
| 1 |
| AS205676GB | DCE Data Center Experts LTD | 256 | — | 1 |
| AS215252GB | LANTEC-AS Lantec Services Ltd | 256 | 1 | 2 |
| AS211067GB | LEC Eastbourne Borough Council | 256 | — | 1 |
| AS214214GB | Threadneedle_MNT Threadneedle Asset Management Holdings Ltd | 256 | — | 1 |
| AS57161GB | FTSOC Netcalibre Ltd | 256 | — | 1 |
| AS59617GB | ANDYD Andy Davidson | 256 | 1 | 2 |
| AS44504GB | DEV-AS Andy Davidson | 256 | — | 1 |
| AS41380GB | ALD-AS Ald Automotive Ltd | 256 | — | 1 |
| AS200498GB | PWP-ASN Perella Weinberg Partners UK LLP | 256 | — | 1 |
| AS214295GB | SKYNET SKYNET NETWORK LTD | 256 | — | 1 |
| AS48987GB | JYANGNET Jiaxun Yang | 256 | 1 | 2 |
| AS200027GB | RDA-TELECOM RDA GROUP LIMITED | 256 | 1 | 2 |
| AS211049GB | DHSC-ARP Department of Health and Social Care | 256 | — | 1 |
| AS42046GB | ITN Independent Television News Limited | 256 | — | 1 |
| AS204220GB | STARLONDON-AS Star Europe Limited | 256 | — | 1 |
| AS208590GB | AVE-AS Lasagna Ltd | 256 | 65.5K | 2 |
| AS213493GB | NYRU NYRU Services Limited | 256 | — | 1 |
| AS207754GB | COLDERWOOD James Colderwood | 256 | 65.5K | 4 |
| AS3220GB | INTERNET-TECHNOLOGY-ADVISORS Internet Technology Advisors Scandinavia Ab | 256 | — | 1 |
| AS209503GB | Zentyx Zentyx Limited | 256 | 1 | 2 |
| AS197576GB | zumbak ZUMBAK LTD | 256 | — | 1 |
| AS216186GB | AS_PENTEST Pen Test Partners LLP | 256 | 65.5K | 2 |
| AS50888GB | MINOTAUR-ASN Minotaur I.T. Limited | 256 | — | 1 |
| AS34900GB | CME-AS-LO2-2 CME Operations Limited | 256 | — | 1 |
| AS208723GB | VDX-SYSTEMS VDX SYSTEMS LTD | 256 | 4 | 5 |
| AS39459GB | PGL-AS Office Unlocked Limited | 256 | — | 1 |
| AS204826GB | NR-EU-MA3 North Rock Capital Management (UK) LLP | 256 | — | 1 |
| AS204539GB | AXIC-Axivora-Connect-Ltd Axivora Connect LtD | 256 | 77 | 18 |
| AS215008GB | E-VOLVE e-volve Solutions Ltd | 256 | 524.3K | 2 |
| AS29200GB | ESEYE Eseye Ltd | 256 | 524.3K | 2 |
| AS215959GB | NUSOUKMAN NUSO CLOUD UK LIMITED | 256 | — | 1 |
| AS210005GB | easysoft Easysoft Ltd | 256 | — | 1 |
| AS211198GB | WHITESPIDER WhiteSpider Enterprise Services Limited | 256 | — | 1 |
| AS213515GB | Honeybank-Studios Honeybank Studios LTD | 256 | — | 1 |
| AS47935GB | QUANTUMUK-AS Quantum Communications Ltd | 256 | 65.5K | 2 |
| AS211431GB | AndrewA Andrew Aubury | 256 | 369 | 10 |
| AS207295GB | Akhtar Akhtar Technologies Limited | 256 | — | 1 |
| AS50108GB | EA-UK-BIR Electronic Arts Limited | 256 | — | 1 |
| AS213150GB | INDIGO-SYS Laurence White | 256 | 524.3K | 2 |
| AS208902GB | ValeroUK Valero Energy Ltd | 256 | — | 1 |
| AS200473GB | Samsung-MSK-AS Samsung SDS Europe Ltd | 256 | — | 1 |
| AS207601GB | EA-FR-LYON Electronic Arts Limited | 256 | — | 1 |
| AS209324GB | BG-SOF Genius Sports UK Limited | 256 | — | 1 |
| AS41612GB | REDBEE-AS Red Bee Media Limited | 256 | — | 1 |
| AS205237GB | SAVILLS-PLC SAVILLS PLC | 256 | — | 1 |
| AS216243GB | BJEONYX JACO ENGELBRECHT | 256 | 1 | 2 |