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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 | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS8426GB | CLARANET-AS Claranet Limited | 909.3K | 100 |
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| 0 |
| AS205986GB | GLYN-Research-Ltd GLYN Research Limited | — | — | 0 |
| AS204853GB | SurreyHillsInternet HFLBroadband Ltd | — | — | 0 |
| AS215963GB | torin Torin Storkey | — | — | 0 |
| AS200493GB | WHITEQUARK-AS Ekaterina Zotova | — | 1 | 1 |
| AS12576GB | EE EE Limited | — | — | 0 |
| AS8276GB | VONESERVICES Vone Services Ltd | — | — | 0 |
| AS12290GB | EXONETRIC Exonetric Consulting Ltd | — | — | 0 |
| AS200427GB | PROXIMITY-AS Proximity Data Centres Limited | — | — | 0 |
| AS199804GB | TFES-AS THE FIRST EAST STAR LTD | — | — | 0 |
| AS64474GB | ASN-IITSS IT Support Services Team Limited | — | — | 0 |
| AS5519GB | Wavenet-AS5519 Wavenet Limited | — | — | 0 |
| AS211209GB | EUROPEANEDGE-IX AIRBYTES COMMUNICATIONS Limited | — | — | 0 |
| AS211036GB | LSYS1 Nathan James | — | — | 0 |
| AS43878GB | EUROPE-CONNECTED Clouvider Limited | — | — | 0 |
| AS35069GB | TIBRA-LD-AS Tibra Trading Europe Limited | — | — | 0 |
| AS207602GB | EA-CH-GENEVA Electronic Arts Limited | — | — | 0 |
| AS205210GB | ECHOSTREAM ECHOSTREAM LIMITED | — | — | 0 |
| AS204675GB | DIGIBIT DIGIBIT TECH LTD | — | — | 0 |
| AS48875GB | PANTOR-ENGINEERING-ASN Goldman Sachs International | — | — | 0 |
| AS209869GB | OLLIES_CLOUD Ollie's Cloud LTD | — | — | 0 |
| AS41393GB | NASSTAR-AS GCI Network Solutions Limited | — | — | 0 |
| AS39553GB | BLUEPRINTGAMING Blueprint Gaming Ltd. | — | — | 0 |
| AS57276GB | OPTIMITY Vorboss Limited | — | — | 0 |
| AS35375GB | CONSENSUSONE BITNIFTY LTD | — | — | 0 |
| AS21493GB | PKXGEU GTT - EMEA Ltd. | — | — | 0 |
| AS47999GB | TCL-AS Verint Systems UK Limited | — | — | 0 |
| AS47693GB | LEGENDCOM Talk Straight Ltd. | — | — | 0 |
| AS35082GB | TALKSTRAIGHT-AS Talk Straight Ltd. | — | — | 0 |
| AS2529GB | DEMON-INTERNET - IDDQD-AS | — | — | 0 |
| AS215499GB | richard-franks Richard Franks | — | — | 0 |
| AS213085GB | LOGINELTDAS Internet Utilities Europe and Asia Limited | — | — | 0 |
| AS215231GB | volq-capital VolQ Capital Ltd | — | — | 0 |
| AS203074GB | NOTICOR Ashley Primo | — | — | 0 |
| AS210703GB | FIRSTBYTE-AS FIRSTBYTE HOSTING LTD | — | — | 0 |
| AS215242GB | DATAPENTA DATAPENTA LIMITED | — | — | 0 |
| AS47871GB | ASNMGL Newsquest Media Group Ltd | — | — | 0 |
| AS210683GB | syo Syo.io Limited | — | — | 0 |
| AS210396GB | broadwaypartners Voneus Ltd | — | — | 0 |
| AS211307GB | Fibreme Upp Corporation Limited | — | — | 0 |
| AS206637GB | IQIP-AS CSL (DualCom) Limited | — | — | 0 |
| AS205441GB | LUMO Lumo Cloud Limited | — | — | 0 |
| AS203109GB | ORG-AL1060-RIPE AeroFibre Ltd | — | — | 0 |
| AS200917GB | LITEPLATE-AS LITEPLATE ENTERPRISE LIMITED | — | — | 0 |
| AS206509GB | KCOM-UK-AS KCOM Group Limited | — | — | 0 |
| AS50697GB | ACSN-AS Reliance Cyber Ltd | — | — | 0 |
| AS201164GB | Cool-Studio Cool Studio Limited | — | — | 0 |