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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 |
| 512 |
| 1 |
| 3 |
| AS210253GB | CREATIVE-NETWORK-CONSULTING-AS Creative Network Consulting Limited | 512 | — | 2 |
| AS208638GB | mimecast-it-corp Mimecast Services Limited | 512 | — | 2 |
| AS42053GB | STARLING Starling Bank Limited | 512 | — | 2 |
| AS25050GB | BACS-AS VOCALINK LTD | 512 | — | 1 |
| AS202574GB | ASN-VLE VLE LIMITED | 512 | — | 2 |
| AS41538GB | INSPIRED-AS Inspired Gaming (UK) Limited | 512 | — | 2 |
| AS62364GB | PLYMOUTH-CITY-COUNCIL Plymouth City Council | 512 | — | 2 |
| AS206870GB | bcg-as Brightcloud Ltd | 512 | — | 2 |
| AS216376GB | pinkfroot Pinkfroot Ltd | 512 | — | 1 |
| AS211476GB | techloq-uk Techloq Limited | 512 | 65.5K | 3 |
| AS211760GB | CCL-LDN Cleveland Clinic London Ltd | 512 | — | 2 |
| AS22665GB | SWIFTLET Swiftlet Labs Ltd | 512 | 65.6K | 4 |
| AS61093GB | SC Solution Computers Ltd | 512 | — | 2 |
| AS208781GB | UK-SMARTCT1-20190320 SMART CT LIMITED | 512 | — | 1 |
| AS48761GB | MAXINAMES Maxinames Ltd | 512 | — | 2 |
| AS207194GB | TOTALCOMPUTERS Total Computer Services Ltd | 512 | — | 2 |
| AS41493GB | CHI-X Cboe Europe Limited | 512 | — | 2 |
| AS203184GB | FNZ-EU FNZ HOLDINGS UK LIMITED | 512 | — | 2 |
| AS212035GB | Babcock_International Babcock Corporate Services Ltd | 512 | — | 2 |
| AS207108GB | ahcloud AH CLOUD LTD | 512 | 5 | 7 |
| AS213482GB | WATERFALL Waterfall Technologies Ltd | 512 | 4.2K | 12 |
| AS210282GB | FRONTIERDC-AS Frontier Technology Limited | 512 | — | 2 |
| AS51845GB | WATERSTONS-AS WATERSTONS LIMITED | 512 | — | 2 |
| AS203767GB | CLARITAS-A Claritas Solutions Limited | 512 | — | 2 |
| AS200105GB | JUNGLELABS JUNGLELABS LTD | 512 | 12 | 14 |
| AS210412GB | hampsteadfibre Hampstead Fibre Ltd | 512 | 524.3K | 3 |
| AS214199GB | luxxysystems Johnathan Hine | 512 | 2 | 4 |
| AS210203GB | RETN-IT-AS RETN Limited | 512 | — | 1 |
| AS219326GB | SULAVIL SULAVI LTD | 512 | — | 2 |
| AS218805GB | STACKLAYER-NET Stacklayer Communications Limited | 512 | 4.1K | 4 |
| AS213051GB | ZENEX5IVE-US Zenex 5ive Limited | 512 | — | 2 |
| AS206166GB | SCHRODERS-UK-AS Schroder Investment Management Limited | 512 | — | 2 |
| AS59410GB | BARRITEC Barritel Ltd | 512 | 65.5K | 3 |
| AS199301GB | SOLUTIONS-AS RLE SOLUTIONS LTD | 512 | — | 2 |
| AS209870GB | Cylo Cylo Ltd | 512 | 524.3K | 3 |
| AS207158GB | WORLDCDN Clouvider Limited | 512 | — | 2 |
| AS205177GB | IVANTI-UK IVANTI UK LIMITED | 512 | — | 1 |
| AS49958GB | EVO-AS Evolution Gaming LTD | 512 | — | 2 |
| AS50078GB | X-ON X-ON HEALTH LIMITED | 512 | — | 2 |
| AS47571GB | DCMANAGED Digital Craftsmen Ltd. | 512 | — | 2 |
| AS201301GB | soundmouse-netwise Soundmouse Ltd | 512 | 131.1K | 4 |
| AS31743GB | IPGGIS-UK-AS Interpublic GIS (UK) Ltd | 512 | 524.3K | 3 |
| AS199379GB | MARKERSTUDY-AS Markerstudy Insurance Services Limited | 512 | — | 2 |
| AS206143GB | asn-networked2 Networked Creativity LLP | 512 | — | 2 |
| AS198685GB | LUNAR-AS LUNAR HOSTING LTD | 512 | — | 2 |
| AS16204GB | AS44574 Network Services Ltd. | 512 | 1 | 3 |