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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.
3,134 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 173 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 368 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,290 |
| 2.3K |
| 4 |
| 10 |
| AS47582GB | ansonnet-as-uk ANSON NETWORK LIMITED | 2.3K | — | 3 |
| AS203363GB | KUROIT Kuroit Limited | 2.3K | 2 | 11 |
| AS203235GB | ZANANET zananet Limited | 2.3K | 524.3K | 4 |
| AS15768GB | ASWORLDPAY WorldPay (UK) Limited | 2.3K | — | 7 |
| AS203204GB | SERVICEDCLOUD Serviced Cloud Ltd | 2.3K | — | 3 |
| AS204154GB | FIRST-SERVER-US-AS FIRST SERVER LIMITED | 2.3K | 3 | 10 |
| AS48549GB | BRINGOGROUP Bringo Group Ltd | 2.3K | — | 6 |
| AS212047GB | CIVO-USA Civo LTD | 2.3K | 65.5K | 3 |
| AS60255GB | InternettyUK Internetty Ltd | 2.3K | 524.3K | 6 |
| AS51159GB | THINKSYSTEMSUK-ASN CT1 Technologies Ltd | 2.3K | — | 5 |
| AS203649GB | goInternet GO INTERNET LTD | 2.3K | 524.3K | 10 |
| AS8330GB | LONAP LONAP Ltd | 2.3K | 65.5K | 3 |
| AS201714GB | LinkIPNetworks Link IP Networks Ltd | 2.3K | — | 6 |
| AS206352GB | MEDIACONNECTIVE Media Connective LLP | 2.3K | — | 5 |
| AS34654GB | IONIC-AS Merula Limited | 2.3K | — | 2 |
| AS212175GB | STELIA Stelia Ltd | 2.3K | 524.3K | 15 |
| AS201101GB | NATSEN-NC NATS (En Route) Ltd | 2.3K | — | 7 |
| AS205771GB | OCTAPLUSUK OCTAPLUS NETWORKS LTD | 2.3K | 196.6K | 9 |
| AS201536GB | SANDYXHOSTING-AS SANDYX SYSTEMS LIMITED | 2.3K | 524.3K | 18 |
| AS47227GB | SERVOLOGY Charles Briscoe-Smith trading as Servology | 2.6K | 65.5K | 4 |
| AS205290GB | NAOBOROT-AS NAOBOROT LLP | 2.6K | — | 10 |
| AS208802GB | Netavo Netavo Global Data Services Ltd | 2.6K | 524.3K | 4 |
| AS201902GB | BICOM Bicom Systems Limited | 2.6K | 2 | 8 |
| AS204914GB | LABIXE LABIXE LTD | 2.6K | 1 | 11 |
| AS208621GB | logicforge LogicForge Limited | 2.6K | 73.7K | 19 |
| AS201862GB | VMhosts-London-AS VMhosts Ltd | 2.6K | 65.5K | 8 |
| AS205091GB | EuroNet EuroNet Internet Ltd | 2.6K | 524.3K | 10 |
| AS196962GB | ANTHEIA NSI (Holdings) Limited | 2.6K | 1 | 7 |
| AS39588GB | MIMECAST-DE Mimecast Services Limited | 2.6K | 2 | 10 |
| AS203897GB | ITLAB ADVANIA UK LIMITED | 2.6K | — | 8 |
| AS29626GB | STAFFSCC Staffordshire County Council | 2.6K | — | 2 |
| AS16224GB | FIFA-AS Verizon UK Limited | 2.6K | — | 10 |
| AS219005GB | NOVUM NOVUM VENTURES LTD | 2.6K | — | 10 |
| AS205847GB | BORDERLINK GoFibre Holdings Limited | 2.6K | 9.2K | 17 |
| AS48688GB | Thales_UK_Ltd Thales UK Ltd | 2.6K | — | 4 |
| AS210450GB | ASN_NHSBARTSHEALTH BARTS HEALTH NHS TRUST | 2.6K | — | 3 |
| AS209594GB | IGC-AS IGC Technical Solutions Ltd | 2.6K | 524.3K | 6 |
| AS16164GB | SOHONET-AS Sohonet Limited | 2.6K | 65.5K | 4 |
| AS62172GB | AIRBYTES AIRBYTES COMMUNICATIONS Limited | 2.6K | 262.1K | 14 |
| AS209243GB | quickhostuk QuickHostUK Limited | 2.6K | 65.5K | 11 |
| AS198554GB | DXI-AS 8X8 UK Limited | 2.6K | — | 7 |
| AS47716GB | ISIX-CLOUD-AS ISIX Communications LLP | 2.6K | 524.3K | 5 |
| AS51100GB | Kier Kier Ltd | 2.6K | — | 7 |
| AS47797GB | ESSEXCC-AS Essex County Council | 2.6K | — | 2 |
| AS205654GB | ASN-LABTECH Labtech Systems Ltd | 2.6K | — | 8 |
| AS213001GB | LA5 LA5 Digital LTD | 2.6K | — | 8 |