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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.
3,123 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications PLC | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 168 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 340 |
| AS212238GB | CDNEXT Datacamp Limited | 1M | 4,120 |
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| AS199794GB | EMO-AS EMOCLOUD LTD | — | 528 | 3 |
| AS214160GB | SHREE Shreejal Maharjan | — | 3 | 3 |
| AS213767GB | RH Richard Humphries | — | 1 | 1 |
| AS5600GB | TCPNET-AS BNW TECHNOLOGY LTD | — | — | 0 |
| AS43313GB | FLT ITS Technology Group Limited | — | — | 0 |
| AS45828GB | WORLDREACH Hello World Ltd | — | — | 0 |
| AS213982GB | DISTRICTB-AS Callum Bennett | — | 17 | 2 |
| AS50697GB | ACSN-AS Reliance Cyber Ltd | — | — | 0 |
| AS216364GB | uk-globalreachtech Global Reach Technology EMEA Limited | — | 8.2K | 2 |
| AS25376GB | NETNORTH-ASN Netnorth Limited | — | — | 0 |
| AS199519GB | THATGUYJACK-NET Jack Brierley | — | 8 | 8 |
| AS25041GB | AWS-DX British Telecommunications PLC | — | — | 0 |
| AS57014GB | metroswitch 4on LTD | — | — | 0 |
| AS197976GB | FAVBET-AS Favbet Invest LLP | — | — | 0 |
| AS215002GB | PRISMGG PRISM.GG Limited | — | 80 | 2 |
| AS198796GB | PEARSON-HARPER Phusion IM Limited | — | — | 0 |
| AS209771GB | SYSN SYSN LTD | — | 2 | 2 |
| AS44474GB | Spectron-Services-Ltd Marex Financial Ltd | — | — | 0 |
| AS49898GB | MYMIND BLOCZ IO LIMITED | — | — | 0 |
| AS47918GB | MCDEU03 MCD Europe Limited | — | — | 0 |
| AS210090GB | PIPER-AS Zack Piper | — | — | 0 |
| AS20629GB | UK-BIS Six Degrees Technology Group Limited | — | — | 0 |
| AS203054GB | ORG-TCL96-RIPE TownFibre Connect Ltd | — | 1 | 1 |
| AS202517GB | ZOPA ZOPA BANK LIMITED | — | — | 0 |
| AS199766GB | JNET Julita Oskroba | — | — | 0 |
| AS202415GB | IDSI-2 Integrated Digital Services Ltd | — | — | 0 |
| AS215397GB | JA-Software-Solutions-Limited JA Software Solutions Limited | — | — | 0 |
| AS215152GB | ORG-CUL21-RIPE CATERING UK LIMITED | — | — | 0 |
| AS213803GB | AS-Xray Xray Network Ltd | — | — | 0 |
| AS205265GB | KADFIRE-SEC Kadfire Limited | — | — | 0 |
| AS39192GB | JackNet John Hadrill | — | — | 0 |
| AS213843GB | KOARA-AS Koara International Limited | — | — | 0 |
| AS208485GB | PINHOUSE-AS PINHOUSE LIMITED | — | 1 | 1 |
| AS213385GB | Look_Web_Hosting_And_Web_Development LOOK WEB HOSTING AND WEB DEVELOPMENT LTD | — | — | 0 |
| AS56979GB | fulcrum Fulcrum Data Systems Ltd | — | — | 0 |
| AS59426GB | ISP-INTEXON-LTD INTEXON LTD | — | — | 0 |
| AS213112GB | IPMultihome IP Multihome Limited | — | — | 0 |
| AS212434GB | ITOGETHER Network Integration Technologies LTD | — | — | 0 |
| AS203873GB | HEX-NETWORK Alexander Berry-Roe | — | 288 | 3 |
| AS43838GB | Education-Bradford City of Bradford Metropolitan District | — | — | 0 |
| AS213210GB | kingslanding-as Richard-Connon | — | 1 | 1 |
| AS200304GB | Everyday-Communications Everyday Communications LTD | — | — | 0 |
| AS44360GB | IPASSETS Bink Group Ltd | — | — | 0 |
| AS199423GB | nexttranslate-as NEXTTRANSLATE LTD | — | — | 0 |
| AS199534GB | INTERFIBER-CI Interfiber Ltd | — | — | 0 |
| AS28705GB | CYBASE-AS Cybase Limited | — | — | 0 |