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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 |
| 1K |
| — |
| 1 |
| AS204598GB | AS-VILLAGENETWORKS Village Networks Ltd. | 1K | 524.3K | 4 |
| AS47556GB | WEBTIT Webtitude LTD | 1K | 327.7K | 6 |
| AS213078GB | wifiscotland WiFi Scotland LLP | 1K | 524.3K | 2 |
| AS202241GB | BDC-London Business Design Centre Ltd | 1K | — | 1 |
| AS198798GB | OFLI-AS OFFICE LIMITED | 1K | — | 4 |
| AS203573GB | tmcs Tailor Made Technologies Ltd | 1K | — | 1 |
| AS44749GB | Pinnacom-ISP Pinnacom Ltd | 1K | 1M | 10 |
| AS204486GB | CHES-EAST Cheshire East Council | 1K | — | 1 |
| AS58101GB | GLADSERV Gladserv Limited | 1K | 65.6K | 6 |
| AS131222GB | UK-ALPHA GamerDating Ltd | 1K | — | 4 |
| AS29164GB | IOMARTHOSTING-EU Iomart Group Plc | 1K | 65.5K | 5 |
| AS205106GB | PEASOUP Pea Soup Hosting Limited | 1K | — | 3 |
| AS198312GB | SPECTRAGROUP Spectra Group (uk) Ltd | 1K | 65.5K | 5 |
| AS205402GB | INTERCITY-TECH-THN Intercity Technology Ltd | 1K | — | 4 |
| AS51318GB | STANDARD-CHARTERED-BANK-AS STANDARD CHARTERED BANK | 1K | — | 4 |
| AS200052GB | FERAL Feral.io Ltd | 1K | — | 1 |
| AS205734GB | TRAPOC Copart UK Limited | 1K | — | 4 |
| AS213786GB | idash IDASH SOLUTIONS LIMITED | 1K | — | 1 |
| AS59402GB | Virocom Virocom Limited | 1K | 524.3K | 2 |
| AS62224GB | BullhornUK Bullhorn, International Limited | 1K | — | 4 |
| AS205996GB | Interfiber Interfiber Ltd | 1K | 65.5K | 2 |
| AS56670GB | WSCC-AS West Sussex County Council | 1K | — | 2 |
| AS201903GB | EVORIO-AS Evorio Limited | 1K | — | 1 |
| AS209113GB | PRECEDENCE Precedence Technologies Ltd | 1K | — | 3 |
| AS60333GB | UOMCOMM The University of Manchester | 1K | — | 1 |
| AS205767GB | Spectron-Services Spectron Services Limited | 1K | — | 1 |
| AS200124GB | FLEXUK-AS FLEXTRADE UK LIMITED | 1K | — | 4 |
| AS201506GB | INCITO Incito Limited | 1K | 65.5K | 2 |
| AS216207GB | NEWCASTLE-COUNCIL-AS Newcastle City Council | 1K | — | 3 |
| AS39610GB | LCH-CLEARNET LCH Group Holdings Limited | 1K | — | 3 |
| AS41281GB | KEFF KeFF Networks Ltd | 1K | 2 | 6 |
| AS44009GB | SLEEK-ASN Rackspace Ltd. | 1K | 65.5K | 2 |
| AS201277GB | Eloquent-AS Eloquent Technologies Ltd | 1K | 524.3K | 2 |
| AS197282GB | WGMAST Wood Group UK Limited | 1K | — | 4 |
| AS206682GB | lima LIMA Networks Limited | 1K | — | 1 |
| AS201060GB | snetterton SNETTERTON TELECOM LIMITED | 1K | — | 4 |
| AS201867GB | OXAGON-AS OXAGON LIMITED | 1K | — | 4 |
| AS199569GB | Cognizant-EU-AS Cognizant Worldwide Limited | 1K | 65.5K | 3 |
| AS200870GB | RTSL_AS Retail Technology Services Ltd | 1K | — | 3 |
| AS208524GB | VITS-Hosting-Services VITS LIMITED | 1K | — | 1 |
| AS214480GB | Innova-Communications Innova Communications Limited | 1K | 285 | 33 |
| AS205918GB | vertivco-emea VERTIV COMPANY GROUP LIMITED | 1K | — | 1 |
| AS205599GB | abfoods A.B.F.HOLDINGS LIMITED | 1K | — | 1 |
| AS197223GB | WEDROPCODE-AS WEDROPCODE LTD | 1K | — | 4 |
| AS205804GB | DELTAV Delta V Technologies Limited | 1K | 65.5K | 10 |
| AS57110GB | AARAN-CLOUD-AS Aaran Perry | 1K | 1.8K | 14 |