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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.
3,132 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 | 369 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,286 |
| 256 |
| — |
| 1 |
| AS214424GB | NFORTO-AS nForto Ltd | 256 | — | 1 |
| AS198375GB | DELUSION-NET Delusion Limited | 256 | 1 | 2 |
| AS215833GB | AblativeConsulting Ablative Consulting Ltd | 256 | 1 | 2 |
| AS211244GB | CANIDAE-SYSTEMS Harley Tomas Watson | 256 | 1 | 2 |
| AS214770GB | RGN RGN Holding Ltd. | 256 | 34 | 5 |
| AS213565GB | Badonde-Networks David Davies | 256 | 65.5K | 3 |
| AS60758GB | DMC-AS Deluxe UK Holdings Limited | 256 | — | 1 |
| AS214451GB | R3ido101 Oliver Reid | 256 | 131.1K | 3 |
| AS200692GB | KO-EU-ASN1 KLDiscovery Limited | 256 | — | 1 |
| AS49882GB | SKRILL Paysafe Holdings UK Limited | 256 | — | 1 |
| AS34625GB | OSHS-AS OSHS Ltd | 256 | — | 1 |
| AS56723GB | EA-ES-OMBU Electronic Arts Limited | 256 | — | 1 |
| AS202359GB | glauca-carrier AS207960 Cyfyngedig | 256 | 5 | 6 |
| AS212446GB | caciltd CACI Ltd | 256 | — | 1 |
| AS216014GB | BestDC-Limited BestDC Limited | 256 | — | 1 |
| AS47935GB | QUANTUMUK-AS Quantum Communications Ltd | 256 | 65.5K | 2 |
| AS218805GB | MEDIBUDDY-UK Medibuddy LTD | 256 | 1 | 2 |
| AS213885GB | WXTANGO-MNT Wilxite Ltd | 256 | — | 1 |
| AS35196GB | IH-TRANSIT-AS FIRST SERVER LIMITED | 256 | 1 | 2 |
| AS50108GB | EA-UK-BIR Electronic Arts Limited | 256 | — | 1 |
| AS214323GB | MSH-UK Marcus Hughes | 256 | 2 | 3 |
| AS43079GB | Matchtech MATCHTECH GROUP (UK) LIMITED | 256 | — | 1 |
| AS215252GB | LANTEC-AS Lantec Services Ltd | 256 | 1 | 2 |
| AS207960GB | AS-TRANSRIGHTS AS207960 Cyfyngedig | 256 | 7 | 8 |
| AS59904GB | LANCASHIRE_AS_RIPE LANCASHIRE INSURANCE SERVICES LTD | 256 | — | 1 |
| AS209220GB | AblativeHosting Ablative Hosting Ltd | 256 | 1 | 2 |
| AS43392GB | BLUEBAY-ASSET-AS RBC Global Asset Management (UK) Limited | 256 | — | 1 |
| AS204776GB | Mintopia Jessica Smith | 256 | 257 | 3 |
| AS208723GB | VDX-SYSTEMS VDX SYSTEMS LTD | 256 | 4 | 5 |
| AS49049GB | BATH-NORTH-EAST-SOMERSET-COUNCIL Bath North East Somerset Council | 256 | — | 1 |
| AS197576GB | zumbak ZUMBAK LTD | 256 | — | 1 |
| AS198628GB | FIDESSA-AS FIDESSA TRADING UK LIMITED | 256 | — | 1 |
| AS57586GB | VENSERVE-AS TOURLINK ORGANIZATION LLP | 256 | — | 1 |
| AS48686GB | SOLTECH-ASN oRe Networks Limited | 256 | 1 | 2 |
| AS51392GB | FUSIONED Fusioned Ltd | 256 | 65.5K | 2 |
| AS56929GB | WBC-NET WANDSWORTH-BOROUGH-COUNCIL | 256 | — | 1 |
| AS211829GB | Zaha ZHA ARCHITECTS LIMITED | 256 | — | 1 |
| AS205615GB | SSC SS&C Solution Limited | 256 | — | 1 |
| AS203403GB | Flextel Flextel Limited | 256 | — | 1 |
| AS212788GB | edgenet Edge Network Technologies Ltd | 256 | — | 1 |
| AS208665GB | TELEKLINE-AS Gareth Pulham | 256 | 2 | 3 |
| AS215303GB | Qubitbytes Qubitbytes LTD | 256 | — | 1 |
| AS211437GB | SurlyNet Gareth Woolridge | 256 | 16 | 2 |
| AS201694GB | RethinkTS Rethink Technology Solutions Ltd | 256 | — | 1 |
| AS197104GB | GENTOO-AS Gentoo Group Limited | 256 | — | 1 |
| AS209734GB | STARFALL STARFALL DISTRIBUTION LTD | 256 | — | 1 |