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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.
| AS | Holder | IPv4 | Prefixes |
|---|---|---|---|
| AS5089GB | NTL Virgin Media Limited | 23M | 299 |
| AS2856GB | BT-UK-AS British Telecommunications Limited | 18.5M | 555 |
| AS13285GB | OPALTELECOM-AS TalkTalk Communications Limited | 7.7M | 99 |
| AS786GB | JANET Jisc Services Limited | 7.2M | 222 |
| AS5607GB | BSKYB-BROADBAND-AS Sky UK Limited | 6.9M | 80 |
| 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 |
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.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS34344GB | THE-PORT-OF-TILBURY-LONDON-LTD Port Of Tilbury London Ltd | 1K | — | 3 |
| AS206062GB | SpaceDataCentres Space Data Centres Ltd | 1K | — | 1 |
| AS208765GB | Bulletproof Bullet Proof VPN Ltd | 1K | 524.3K | 5 |
| AS204204GB | uk_point72uklimited Point72 UK Limited | 768 | — | 3 |
| AS21371GB | EQUINIX-UK-ASN EQUINIX (SERVICES) LIMITED | 768 | — | 2 |
| AS204928GB | AS-BONSAIHOST Bonsai Hosting ltd | 768 | 65.5K | 4 |
| AS199654GB | OXIDE-GROUP-LIMITED Oxide Group Limited | 768 | 4 | 7 |
| AS202154GB | brevanhoward Brevan Howard Asset Management LLP | 768 | — | 3 |
| AS212406GB | TransFICC TransFICC Ltd. | 768 | — | 3 |
| AS212656GB | UK-3VEREST 3verest Limited | 768 | — | 3 |
| AS34099GB | ROAD-TECH-COMPUTER-SYSTEMS Road Tech Computer Systems Ltd. | 768 | — | 2 |
| AS196809GB | FM FremantleMedia Limited | 768 | — | 3 |
| AS202364GB | gridh Grid Hosting Limited | 768 | — | 3 |
| AS197669GB | CLOUDCALL-UK-AS CloudCall LTD | 768 | 3 | 6 |
| AS35437GB | zonebroadband Zone Telecommunications Ltd | 768 | — | 2 |
| AS209134GB | REVOPCI Atmoso Limited | 768 | — | 3 |
| AS208711GB | ARVOX-DIGITAL ARVOX DIGITAL LTD | 768 | 3 | 6 |
| AS212240GB | RIKNETWORKS RIK Networks Ltd | 768 | — | 3 |
| AS214228GB | FPCE-AS Freepoint Commodities Europe LLP | 768 | — | 2 |
| AS201131GB | LGH-Network LIGA HOSTING LTD | 768 | 261 | 9 |
| AS215657GB | Hachette-UK Hachette UK Limited | 768 | — | 2 |
| AS34745GB | TELEWARE TeleWare Hosted Services Ltd. | 768 | — | 2 |
| AS40992GB | MAREX Marex Financial Ltd | 768 | — | 2 |
| AS202665GB | SMSHW SMShighway Limited | 768 | — | 3 |
| AS206499GB | LOCIX LOCIX LIMITED | 768 | 180.5K | 29 |
| AS43525GB | TRENCHANT-AS Oculon LLP | 768 | — | 3 |
| AS6911GB | PRO-NET Associated Networks (UK) Limited | 768 | — | 2 |
| AS213755GB | LUNORY-AS LUNORY CLOUD SOLUTIONS LTD | 768 | — | 3 |
| AS48804GB | GLOBALSIGN GMO GlobalSign Ltd | 768 | 196.6K | 6 |
| AS215675GB | perceptiontvcdn Perception TVCDN Ltd | 768 | — | 3 |
| AS59952GB | ExpediaEU Expedia.com Ltd. | 768 | — | 3 |
| AS213460GB | simplisticnodeus Lonex Group Limited | 768 | 1 | 4 |
| AS219200GB | CRYPHORA-AS Cryphora Limited | 768 | — | 3 |
| AS209363GB | skinark-as SKINARK LTD | 768 | — | 3 |
| AS25546GB | BROOKLANDCOMP-AS Brookland Computer Services Limited | 768 | — | 2 |
| AS202548GB | QUADRIS Quadris Ltd | 768 | 524.3K | 4 |
| AS214663GB | DanBot-Hosting-LTD DanBot Hosting LTD | 768 | 17 | 5 |
| AS59907GB | IMSHealth IQVIA SOLUTIONS HQ LTD | 768 | — | 3 |
| AS216104GB | Photonic-Networks-Ltd Photonic Networks Ltd | 768 | 524.3K | 4 |
| AS201226GB | LEASINGOPTIONSLTD-AS Leasing Options Limited | 768 | — | 2 |
| AS209888GB | AERIANDI-AS Aeriandi Limited | 768 | — | 3 |
| AS43428GB | YAHOO-ULS Yahoo-UK Limited | 768 | 1 | 4 |
| AS204242GB | TRUTECS-AS Trutec Services | 768 | — | 3 |
| AS31202GB | QUALCOMM QUALCOMM (UK) LIMITED | 768 | — | 3 |
| AS50156GB | BOXED-IT Boxed IT Ltd. | 768 | 1 | 3 |
| AS202149GB | platformuk Comcast International Holdings UK Limited | 768 | — | 2 |
| AS210054GB | TNCG NCG Energy Ltd | 768 | 1M | 7 |
| AS206372GB | ORCA-AS Orca IT Ltd | 768 | — | 3 |
| AS204945GB | D4T4 Celebrus Technologies plc | 768 | — | 2 |
| AS215821GB | AS215821 London Digital Systems LTD | 768 | 1 | 4 |