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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 | 170 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 976.9K | 4,012 |
| 10K |
| 16 |
| 15 |
| AS25376GB | NETNORTH-ASN Netnorth Limited | 10.2K | 491.5K | 8 |
| AS198220GB | GoGrid Rackspace Ltd. | 10.2K | — | 2 |
| AS41695GB | VOSTRON-AS VOSTRON Limited | 10.2K | 65.5K | 3 |
| AS21459GB | GNSEUROPEUK-AS OneAdvanced It Services Limited | 10.2K | — | 6 |
| AS48254GB | TWENTYI 20i Limited | 10.2K | 14 | 54 |
| AS216047GB | XDPCLOUD-NET INTECLOUD CDNK LTD | 10.2K | — | 27 |
| AS31641GB | ATLAS-COMMUNICATIONS-AS Atlas Communications (NI) Ltd | 10.2K | 65.5K | 5 |
| AS6894GB | KDDI-EUROPE KDDI Europe Ltd | 10.5K | 65.5K | 4 |
| AS33953GB | Experian-AS Experian International Unlimited | 10.5K | — | 3 |
| AS62163GB | IPRIVER-AS IP River Limited | 10.5K | — | 21 |
| AS31742GB | SOTACONNECT Sota Solutions Ltd. | 10.5K | 589.8K | 10 |
| AS48620GB | BEAMING Beaming Ltd | 10.5K | 524.3K | 4 |
| AS42010GB | ITPS I.T. PROFESSIONAL SERVICES LIMITED | 10.5K | 65.5K | 14 |
| AS213094GB | FullFibre Full Fibre Limited | 10.5K | 524.3K | 10 |
| AS60439GB | SERVERNET-AS SERVERNET INTERNET LIMITED | 10.5K | 516 | 41 |
| AS216139GB | IRONHOST Iron Hosting Centre LTD | 10.8K | — | 42 |
| AS205072GB | LAYERSHIFT Layershift Limited | 10.8K | 65.5K | 12 |
| AS204044GB | Onlyservers Packet Star Networks Limited | 10.8K | — | 13 |
| AS16050GB | Refinitiv-Slough-LO5-res-AS Refinitiv Limited | 10.8K | — | 26 |
| AS50300GB | CUSTDC CustodianDC Limited | 10.8K | 337 | 46 |
| AS204339GB | FIRSTSERVER-FL-AS FIRST SERVER LIMITED | 11K | 2 | 45 |
| AS14670GB | WHG-USE1 WHG Hosting Services Ltd | 11K | — | 37 |
| AS21396GB | NETCONNEX NetConnex Broadband Ltd. | 11K | 1.1M | 12 |
| AS48950GB | GLOBALCOLOCATION Global Custom Data Limited | 11K | — | 43 |
| AS199452GB | MS3-AS MS3 Networks Ltd | 11K | — | 10 |
| AS51713GB | WHG-LON WHG Hosting Services Ltd | 11.3K | — | 26 |
| AS31084GB | MAGRATHEA-UK MAGRATHEA TELECOMMUNICATIONS LIMITED | 11.3K | 65.5K | 4 |
| AS49683GB | MASSIVEGRID MASSIVEGRID LTD | 11.5K | 1 | 43 |
| AS200260GB | Debugged-Network Debugged Ltd | 11.5K | 4.4K | 32 |
| AS209693GB | OC-NETWORK OC NETWORKS LIMITED | 11.5K | 6 | 51 |
| AS16224GB | FIFA-AS Verizon UK Limited | 11.5K | — | 24 |
| AS201002GB | PebbleHost-Customers PebbleHost Ltd | 11.5K | 65.8K | 49 |
| AS205917GB | sas_glcom Fluidone Ltd. | 11.8K | — | 9 |
| AS196744GB | CAPITA Capita Business Services Ltd | 11.8K | — | 4 |
| AS42004GB | ULGRP-AS VOIP-UN LIMITED | 11.8K | 65.5K | 9 |
| AS50077GB | SYN-NL SYN LTD | 11.8K | — | 12 |
| AS209181GB | ZENEX5IVE-NL Zenex 5ive Limited | 12K | 524.3K | 49 |
| AS41484GB | nynet NYnet Ltd | 12.3K | 65.5K | 27 |
| AS204731GB | fibrenest FIBRENEST LIMITED | 12.3K | 70.1K | 27 |
| AS61215GB | IIJ-EXLAYER-AS IIJ Europe Limited | 12.3K | 65.5K | 5 |
| AS34660GB | IDAQ-AS Roebuck Group Limited | 12.3K | 1M | 8 |
| AS204139GB | NEXTGLOBALSERVICES NEXT GLOBAL SERVICES L.P. | 12.5K | — | 24 |
| AS44356GB | EPSILON Epsilon Telecommunications Ltd | 12.5K | 131.1K | 31 |
| AS8943GB | JUMP Jump Networks Ltd | 12.5K | 327.7K | 12 |
| AS21099GB | GAMEGROUP-UK-AS Game Retail Ltd | 12.5K | — | 3 |
| AS206134GB | NEKO-AS NEKOBYTE INTERNATIONAL LIMITED | 12.5K | 12.3K | 53 |