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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 |
| 1.8K |
| — |
| 7 |
| AS201715GB | ineedbr Ineedbroadband Ltd | 1.8K | — | 4 |
| AS209082GB | SWLINES Swlines Ltd | 1.8K | 1 | 8 |
| AS48447GB | Sectigo Sectigo Limited | 1.8K | 65.5K | 5 |
| AS219302GB | seally-AS SEALLY LTD | 1.8K | 4 | 11 |
| AS41099GB | globalreach Global Reach Networks Limited | 1.8K | — | 7 |
| AS198386GB | ONI THRIVE OPERATIONS LIMITED | 1.8K | — | 4 |
| AS215089GB | FASTPANDA Fast Panda Limited | 1.8K | — | 7 |
| AS213702GB | QWINS-LTD QWINS LTD | 1.8K | — | 7 |
| AS206069GB | CORNSEED Cornseed Limited | 1.8K | 2 | 8 |
| AS49911GB | DCNET DCNet Limited | 1.8K | 524.3K | 8 |
| AS197462GB | UPHOST-AS UPHOST SOLUTIONS LIMITED | 1.8K | 2 | 9 |
| AS209809GB | ROCO-HOST ROCO HOST LTD | 1.8K | 1 | 8 |
| AS48273GB | ESSENSYS ESSENSYS (UK) Ltd. | 1.8K | — | 7 |
| AS35831GB | VNETRIX-AS Vnetrix Ltd | 1.8K | — | 6 |
| AS214480GB | Innova-Communications Innova Communications Limited | 1.8K | 531 | 12 |
| AS202791GB | CLOUDSRV-ANY Clouvider Limited | 1.8K | — | 7 |
| AS198990GB | PINEHOST-NET Pine Hosting LTD | 1.8K | — | 4 |
| AS61087GB | DGTL DGTL TECH UK LLP | 1.8K | 33 | 10 |
| AS214927GB | PSB-AS PSB HOSTING LTD | 1.8K | 2 | 9 |
| AS210893GB | LAYEREDTECH Layered Technologies Limited | 1.8K | 524.3K | 8 |
| AS196646GB | Datum Datum Datacentres Limited | 1.8K | — | 7 |
| AS202147GB | VPSUS VPSUS LTD | 1.8K | 1 | 8 |
| AS208507GB | MitsubishiHC-Capital Mitsubishi HC Capital UK PLC | 1.8K | — | 5 |
| AS204415GB | nexgen NexGen Cloud Ltd | 1.8K | — | 6 |
| AS215023GB | LIME-HOST LIMEE NETWORK LTD | 1.8K | 1 | 5 |
| AS202454GB | PINE-MEDIA Pine Media Ltd | 1.8K | — | 7 |
| AS29474GB | GHOTI-AS Ghoti Limited | 1.8K | — | 4 |
| AS197246GB | BELGRAVIA-AS BELGRAVIA MEDIA LTD | 1.8K | — | 7 |
| AS41246GB | EMS-AS Electronic Media Services Ltd | 1.8K | — | 4 |
| AS197715GB | Serverbike Serverbike LTD | 1.8K | 2 | 9 |
| AS203185GB | PebbleTree PEBBLETREE LTD | 1.8K | 3 | 10 |
| AS48866GB | NETCRACKER-EMEA-AS Netcracker Technology EMEA Limited | 1.8K | — | 7 |
| AS57228GB | AXIANS-UK-AS Axians Networks Limited | 1.8K | — | 7 |
| AS210387GB | GUARDY Guardy Limited | 1.8K | — | 7 |
| AS204562GB | ASJavelin JAVELIN BROADBAND LIMITED | 1.8K | 524.3K | 5 |
| AS215429GB | Ireland IQVIA SOLUTIONS HQ LTD | 1.8K | — | 3 |
| AS42536GB | Deloitte-UK Deloitte LLP | 2K | — | 1 |
| AS60736GB | The-Internet-Group KOCHO GROUP LIMITED | 2K | — | 3 |
| AS203372GB | GSACAPITAL-EU-AS GSA Capital Services Ltd | 2K | — | 3 |
| AS203842GB | AcoraAPC-AS Acora Limited | 2K | — | 2 |
| AS51572GB | CERULEAN Cerulean Solutions Limited | 2K | — | 1 |
| AS50422GB | RBS-GBM Natwest Markets PLC | 2K | — | 6 |
| AS202312GB | SMBCNIKKOCM SMBC Bank International plc | 2K | 65.5K | 7 |
| AS56460GB | O2-WIFI-AS Telefonica UK Limited | 2K | — | 2 |
| AS21448GB | MWIL Integrated Digital Services Ltd | 2K | — | 2 |
| AS42880GB | HP-BCRS-UK EntServ UK Limited | 2K | — | 1 |