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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 |
| 2.6K |
| — |
| 10 |
| AS205091GB | EuroNet EuroNet Internet Ltd | 2.6K | 524.3K | 10 |
| AS29626GB | STAFFSCC Staffordshire County Council | 2.6K | — | 2 |
| AS60157GB | ANTHEUS Antheus Telecom Ltd | 2.6K | 4 | 12 |
| AS16164GB | SOHONET-AS Sohonet Limited | 2.6K | 65.5K | 4 |
| AS201902GB | BICOM Bicom Systems Limited | 2.6K | 2 | 8 |
| AS39588GB | MIMECAST-DE Mimecast Services Limited | 2.6K | 2 | 10 |
| AS47227GB | SERVOLOGY Charles Briscoe-Smith trading as Servology | 2.6K | 65.5K | 4 |
| AS205847GB | BORDERLINK GoFibre Holdings Limited | 2.6K | 9.2K | 17 |
| AS205654GB | ASN-LABTECH Labtech Systems Ltd | 2.6K | — | 8 |
| AS204914GB | LABIXE LABIXE LTD | 2.6K | 1 | 11 |
| AS203897GB | ITLAB ADVANIA UK LIMITED | 2.6K | — | 8 |
| AS51100GB | Kier Kier Ltd | 2.6K | — | 7 |
| AS62172GB | AIRBYTES AIRBYTES COMMUNICATIONS Limited | 2.6K | 262.1K | 14 |
| AS210450GB | ASN_NHSBARTSHEALTH BARTS HEALTH NHS TRUST | 2.6K | — | 3 |
| AS203067GB | Giacom GIACOM (CLOUD) LIMITED | 2.6K | — | 9 |
| AS203421GB | BALTICBROADBAND-AS Baltic Broadband Limited | 2.6K | — | 4 |
| AS50385GB | HALOCLOUD-NETWORK HaloCloud Network Limited | 2.6K | 1.9K | 17 |
| AS212701GB | HOSTINUX-AS Hostinux Limited | 2.6K | 1 | 11 |
| AS196962GB | ANTHEIA NSI (Holdings) Limited | 2.6K | 1 | 7 |
| AS33970GB | M247 M247 Ltd | 2.3K | — | 6 |
| AS15768GB | ASWORLDPAY WorldPay (UK) Limited | 2.3K | — | 7 |
| AS31151GB | PHG-AS PERFORMANCE HORIZON GROUP LIMITED | 2.3K | — | 9 |
| AS203235GB | ZANANET zananet Limited | 2.3K | 524.3K | 4 |
| AS203649GB | goInternet GO INTERNET LTD | 2.3K | 524.3K | 10 |
| AS60255GB | InternettyUK Internetty Ltd | 2.3K | 524.3K | 6 |
| AS48549GB | BRINGOGROUP Bringo Group Ltd | 2.3K | — | 6 |
| AS204103GB | commswest Comms West Limited | 2.3K | 65.5K | 7 |
| AS201101GB | NATSEN-NC NATS (En Route) Ltd | 2.3K | — | 7 |
| AS203204GB | SERVICEDCLOUD Serviced Cloud Ltd | 2.3K | — | 3 |
| AS204154GB | FIRST-SERVER-US-AS FIRST SERVER LIMITED | 2.3K | 3 | 10 |
| AS35327GB | NAGLOTECH Naglotech Limited | 2.3K | 1 | 6 |
| AS211552GB | CIVO-UK Civo LTD | 2.3K | 65.5K | 3 |
| AS212047GB | CIVO-USA Civo LTD | 2.3K | 65.5K | 3 |
| AS34654GB | IONIC-AS Merula Limited | 2.3K | — | 2 |
| AS51159GB | THINKSYSTEMSUK-ASN CT1 Technologies Ltd | 2.3K | — | 5 |
| AS214467GB | digided-as DIGIDED LTD | 2.3K | — | 9 |
| AS212175GB | STELIA Stelia Ltd | 2.3K | 524.3K | 15 |
| AS50605GB | Radius Radius Communications Ltd | 2.3K | — | 9 |
| AS199286GB | ANS-AS Abtec Network Systems LTD | 2.3K | — | 3 |
| AS21130GB | IOMART-IE IOMART CLOUD SERVICES LIMITED | 2.3K | 1 | 7 |
| AS60670GB | WideFM-LTD WideFM Ltd | 2.3K | 524.3K | 10 |
| AS201536GB | SANDYXHOSTING-AS SANDYX SYSTEMS LIMITED | 2.3K | 524.3K | 18 |
| AS218829GB | DIGITALITCREATIONS-MNT Digital IT Creations Ltd | 2.3K | — | 9 |
| AS204464GB | SHRDSERV SharedServ Ltd | 2.3K | 787K | 18 |
| AS206352GB | MEDIACONNECTIVE Media Connective LLP | 2.3K | — | 5 |
| AS47582GB | ansonnet-as-uk ANSON NETWORK LIMITED | 2.3K | — | 3 |