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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 |
| 35.1K |
| 66 |
| 140 |
| AS31463GB | FourD-AS Redcentric Solutions Ltd | 35.3K | 1.1M | 38 |
| AS29017GB | GYRON NTT Global Data Centers EMEA UK Ltd. | 35.6K | 65.5K | 11 |
| AS41678GB | TIBUS The Internet Business Ltd | 35.8K | — | 19 |
| AS51918GB | CERBERUSNETWORKS-AS Cerberus Networks Ltd | 36.1K | 589.8K | 26 |
| AS49915GB | MEGAPORT Megaport (UK) Limited | 36.1K | 307 | 140 |
| AS203346GB | AS-232WEB Proper Support LLP | 36.4K | — | 99 |
| AS199741GB | TRANSITX-BYOIP-Customers TransitX Ltd | 36.4K | 1 | 137 |
| AS44022GB | BARCLAYS-RETAIL Barclays Bank PLC | 36.4K | — | 20 |
| AS61231GB | Neos-Networks Neos Networks Limited | 36.9K | 524.3K | 9 |
| AS209641GB | I-SERVERS-EAST IHOR HOSTING LTD | 36.9K | 2.3M | 105 |
| AS215439GB | PLAY2GO-NET PLAY2GO INTERNATIONAL LIMITED | 37.1K | 37 | 146 |
| AS207461GB | host-industry HOSTING INDUSTRY LIMITED | 37.4K | 6 | 65 |
| AS49425GB | DIGITAL-REALTY-UK Digital Realty (UK) Limited | 37.4K | 524.3K | 10 |
| AS39545GB | FLUIDATA Fluidone Ltd. | 37.6K | 65.5K | 7 |
| AS6660GB | CWASIA Vodafone Enterprise Equipment Limited | 37.9K | 65.5K | 8 |
| AS60426GB | WIGHTFIBRE WightFibre Limited | 38.9K | 589.8K | 11 |
| AS34010GB | YAHOO-IRD Yahoo-UK Limited | 39.2K | 13 | 53 |
| AS51320GB | wirelesslogic-uk Wireless Logic Limited | 39.4K | — | 30 |
| AS25135GB | vodafone_uk_asn Vodafone Limited | 40.4K | 65.5K | 26 |
| AS34920GB | Simply-Romford Team Blue Carrier Limited | 41K | 65.5K | 14 |
| AS33920GB | AQL (aq) networks limited | 41K | 65.5K | 9 |
| AS57356GB | HIGHNET-AS Highland Network Ltd | 41K | — | 33 |
| AS8622GB | ISIONUK TEAM BLUE INTERNET SERVICES UK LIMITED | 41.2K | 65.5K | 6 |
| AS205489GB | CODEASSET CODE ASSET LTD | 42.2K | — | 154 |
| AS41012GB | THECLOUD The Cloud Networks Limited | 42.2K | — | 10 |
| AS49572GB | FCN Fujitsu Services Ltd. | 43K | 65.5K | 8 |
| AS43915GB | TRUESPEED TrueSpeed Communications Limited | 44.8K | 65.5K | 51 |
| AS24958GB | TBSH CYBERFORT LIMITED | 45.1K | 65.5K | 25 |
| AS49765GB | Comms365 Comms365 Limited | 45.8K | — | 83 |
| AS31404GB | Lycatel-AS LYCATEL DISTRIBUTION UK LIMITED | 47.4K | 18 | 31 |
| AS51043GB | ASPIRE01 Aspire Technology Solutions Ltd | 47.6K | 65.5K | 22 |
| AS5555GB | SOHONETEU-AS Sohonet Limited | 47.6K | 65.5K | 33 |
| AS20738GB | GD-EMEA-DC-LD5 Heart Internet limited | 47.9K | 3 | 81 |
| AS61112GB | AkileCloud AKILE LTD | 48.4K | 1.5K | 167 |
| AS41564GB | AS41564 Orion Network Limited | 48.4K | 7 | 190 |
| AS8419GB | HOTCHILLI Redcentric Solutions Ltd | 49.2K | 65.5K | 6 |
| AS214432GB | NTT-Communications-Corporation Zhilian Technology CO., LTD. | 49.4K | 6 | 189 |
| AS41095GB | IPTP IPTP LTD | 49.4K | 23.3M | 318 |
| AS48945GB | IFNL-AS OPEN FIBRE NETWORKS (WHOLESALE) LIMITED | 50.2K | 524.3K | 40 |
| AS49158GB | WIFINITY WIFINITY NETWORKS LIMITED | 50.2K | 65.5K | 8 |
| AS44444GB | Forcepoint-Cloud-AS Forcepoint UK Limited | 50.7K | 131.1K | 200 |
| AS39356GB | Avanti-UK-AS Avanti Broadband Ltd | 50.9K | 73.7K | 9 |
| AS5631GB | ELEVATE Telcom Networks Limited | 51.5K | 2.1M | 35 |
| AS15533GB | SASEUROPE Redcentric Solutions Ltd | 52.5K | 131.1K | 17 |
| AS207957GB | ServHost-AS SERV.HOST GROUP LTD | 52.7K | 1.6K | 232 |
| AS25577GB | C4L-AS MAINFRAME & CYBERNETIC SYSTEMS LIMITED | 54.8K | 65.5K | 53 |