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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 |
| ASDA-UK-AS Asda Stores Limited |
| 1K |
| — |
| 1 |
| AS47572GB | TICKETMASTER-EU2 Ticketmaster UK Limited | 1K | — | 4 |
| AS199516GB | PACKNET-AS PACKNET LIMITED | 1K | 524.3K | 5 |
| AS208180GB | cts Bluecube Cyber Security Solutions Limited | 1K | — | 1 |
| AS214285GB | ABOVEBAR Above Bar Cyber Limited | 1K | 1 | 5 |
| AS59676GB | NETWORKSERVICES-SEC Network Services Ltd. | 1K | 2 | 6 |
| AS208804GB | Technological Technological Services Limited | 1K | — | 4 |
| AS213549GB | SATISFYHOST SATISFYHOST LTD | 1K | 2 | 6 |
| AS197234GB | stylez STYLEZ AI LTD | 1K | — | 4 |
| AS44749GB | Pinnacom-ISP Pinnacom Ltd | 1K | 1M | 10 |
| AS204236GB | uk-div011 Daniel Ionita | 1K | — | 1 |
| AS50432GB | RBS-GBM-UKSTAFF Natwest Markets PLC | 1K | — | 3 |
| AS208408GB | KARANYI Karanyi Ltd | 1K | 4 | 8 |
| AS20577GB | TRADEWEB TRADEWEB EUROPE LIMITED | 1K | — | 4 |
| AS209329GB | CITYTALK-INTERNET FOCUS 4 U LTD | 1K | — | 1 |
| AS60851GB | EMIS-AS Egton Medical Information Systems Limited | 1K | — | 2 |
| AS20596GB | future Future Publishing Ltd | 1K | 458.8K | 4 |
| AS202907GB | ATOMICIT Atomic IT Limited | 1K | 524.3K | 2 |
| AS56850GB | AKARI-AS Akari Networks Ltd | 1K | — | 1 |
| AS205402GB | INTERCITY-TECH-THN Intercity Technology Ltd | 1K | — | 4 |
| AS198312GB | SPECTRAGROUP Spectra Group (uk) Ltd | 1K | 65.5K | 5 |
| AS197282GB | WGMAST Wood Group UK Limited | 1K | — | 4 |
| AS29164GB | IOMARTHOSTING-EU Iomart Group Plc | 1K | 65.5K | 5 |
| AS206062GB | SpaceDataCentres Space Data Centres Ltd | 1K | — | 1 |
| AS60825GB | CITRIXSYSTEMS-AS-UK CLOUD SG UK LTD | 1K | — | 4 |
| AS57650GB | NOMIOS-ASN Nomios UK&I Limited | 1K | 524.3K | 2 |
| AS205052GB | VISIONDATASOLUTIONS Vision Data Solutions LLP | 1K | 524.3K | 3 |
| AS198306GB | AESL1 AIG Europe (Services) Limited | 1K | — | 3 |
| AS210279GB | DMT DIGITAL MEDIA TECHNOLOGIES LTD | 1K | — | 1 |
| AS205918GB | vertivco-emea VERTIV COMPANY GROUP LIMITED | 1K | — | 1 |
| AS212890GB | AetherCloud ONEMAN NETWORK LIMITED | 1K | 5 | 9 |
| AS201506GB | INCITO Incito Limited | 1K | 65.5K | 2 |
| AS34523GB | EMAILSYSTEMS Webroot Services Ltd | 1K | — | 4 |
| AS60282GB | COVCITYCOUNCIL Coventry City Council | 1K | — | 1 |
| AS209447GB | RETN-TR-AS RETN Limited | 1K | — | 1 |
| AS44955GB | DG-TECHNOLOGY DG Infrastructure Ltd | 1K | — | 4 |
| AS51491GB | SYSGROUP-WALES SysGroup plc | 1K | — | 2 |
| AS213451GB | CILIXNET-AS Cilix Limited | 1K | 589.8K | 6 |
| AS207543GB | DUG-APIC-AUS DOWNUNDER GEOSOLUTIONS (LONDON) PTY LIMITED | 1K | 524.3K | 5 |
| AS44009GB | SLEEK-ASN Rackspace Ltd. | 1K | 65.5K | 2 |
| AS6759GB | IOTX Pelion IoT Limited | 1K | — | 4 |
| AS49440GB | plustel PLUSTEL LIMITED | 1K | 65.5K | 2 |
| AS41232GB | beeline Beeline Broadband Ltd | 1K | — | 1 |
| AS58101GB | GLADSERV Gladserv Limited | 1K | 65.6K | 6 |
| AS208311GB | BOURNELEISURE Bourne Leisure Limited | 1K | — | 1 |
| AS206682GB | lima LIMA Networks Limited | 1K | — | 1 |
| AS208636GB | SDC SDC Hosting and Support Ltd | 1K | — | 4 |