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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 |
| 2 |
| 9 |
| AS197462GB | UPHOST-AS UPHOST SOLUTIONS LIMITED | 1.8K | 2 | 9 |
| AS206069GB | CORNSEED Cornseed Limited | 1.8K | 2 | 8 |
| AS48273GB | ESSENSYS ESSENSYS (UK) Ltd. | 1.8K | — | 7 |
| AS48447GB | Sectigo Sectigo Limited | 1.8K | 65.5K | 5 |
| AS215023GB | LIME-HOST LIMEE NETWORK LTD | 1.8K | 1 | 5 |
| AS209082GB | SWLINES Swlines Ltd | 1.8K | 1 | 8 |
| AS214480GB | Innova-Communications Innova Communications Limited | 1.8K | 531 | 12 |
| AS210387GB | GUARDY Guardy Limited | 1.8K | — | 7 |
| AS41099GB | globalreach Global Reach Networks Limited | 1.8K | — | 7 |
| AS57228GB | AXIANS-UK-AS Axians Networks Limited | 1.8K | — | 7 |
| AS61087GB | DGTL DGTL TECH UK LLP | 1.8K | 33 | 10 |
| AS48866GB | NETCRACKER-EMEA-AS Netcracker Technology EMEA Limited | 1.8K | — | 7 |
| AS215089GB | FASTPANDA Fast Panda Limited | 1.8K | — | 7 |
| AS203185GB | PebbleTree PEBBLETREE LTD | 1.8K | 3 | 10 |
| AS198990GB | PINEHOST-NET Pine Hosting LTD | 1.8K | — | 4 |
| AS196646GB | Datum Datum Datacentres Limited | 1.8K | — | 7 |
| AS202791GB | CLOUDSRV-ANY Clouvider Limited | 1.8K | — | 7 |
| AS49911GB | DCNET DCNet Limited | 1.8K | 524.3K | 8 |
| AS202147GB | VPSUS VPSUS LTD | 1.8K | 1 | 8 |
| AS219302GB | seally-AS SEALLY LTD | 1.8K | 4 | 11 |
| AS218736GB | H1CLOUD H1CLOUD LTD | 1.8K | — | 7 |
| AS210893GB | LAYEREDTECH Layered Technologies Limited | 1.8K | 524.3K | 8 |
| AS214927GB | PSB-AS PSB HOSTING LTD | 1.8K | 2 | 9 |
| AS41246GB | EMS-AS Electronic Media Services Ltd | 1.8K | — | 4 |
| AS35831GB | VNETRIX-AS Vnetrix Ltd | 1.8K | — | 6 |
| AS202454GB | PINE-MEDIA Pine Media Ltd | 1.8K | — | 7 |
| AS209809GB | ROCO-HOST ROCO HOST LTD | 1.8K | 1 | 8 |
| AS208507GB | MitsubishiHC-Capital Mitsubishi HC Capital UK PLC | 1.8K | — | 5 |
| AS29474GB | GHOTI-AS Ghoti Limited | 1.8K | — | 4 |
| AS204562GB | ASJavelin JAVELIN BROADBAND LIMITED | 1.8K | 524.3K | 5 |
| AS204415GB | nexgen NexGen Cloud Ltd | 1.8K | — | 6 |
| AS201715GB | ineedbr Ineedbroadband Ltd | 1.8K | — | 4 |
| AS215429GB | Ireland IQVIA SOLUTIONS HQ LTD | 1.8K | — | 3 |
| AS198386GB | ONI THRIVE OPERATIONS LIMITED | 1.8K | — | 4 |
| AS197246GB | BELGRAVIA-AS BELGRAVIA MEDIA LTD | 1.8K | — | 7 |
| AS213702GB | QWINS-LTD QWINS LTD | 1.8K | — | 7 |
| AS196745GB | DATACENTA-AS Datacenta Hosting Ltd | 1.5K | 11 | 17 |
| AS200636GB | PARAVIRT Paravirt LTD | 1.5K | — | 6 |
| AS60507GB | HML2-EUR-AS Hillside (Technology) Ltd | 1.5K | — | 3 |
| AS44745GB | FIDESSA-AS Fidessa PLC | 1.5K | — | 4 |
| AS49354GB | SIMETRIC TANGO NETWORKS UK LTD | 1.5K | — | 3 |
| AS205114GB | wrtgltd The WEST Retail group LImited | 1.5K | — | 5 |
| AS209452GB | ZuriTechnologies Zuri Technologies Limited | 1.5K | — | 3 |
| AS201755GB | SQUIZUK Squiz UK Limited | 1.5K | — | 4 |
| AS206049GB | COMMUNICATE Communicate Technology LTD | 1.5K | 262.1K | 4 |
| AS206629GB | MINISTRYOFJUSTICE Ministry of Justice | 1.5K | — | 6 |