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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 |
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| 0 |
| AS203873GB | HEX-NETWORK Alexander Berry-Roe | — | 288 | 3 |
| AS49615GB | Ardmore-Construction-Limited Ardmore Construction Limited | — | — | 0 |
| AS213543GB | JONES-LAB Alexander Jones | — | 1 | 1 |
| AS12606GB | EASYNET-NL GTT - EMEA Ltd. | — | — | 0 |
| AS219018GB | gb-ducky Droidhub LTD | — | — | 0 |
| AS60897GB | MEDIRECT Binary Racks Limited | — | — | 0 |
| AS56726GB | fouron 4on LTD | — | — | 0 |
| AS25085GB | ALUE-NET ALUE LTD | — | 10 | 10 |
| AS201280GB | five9uk FIVE9 INC UK LIMITED | — | — | 0 |
| AS204000GB | YAHOO-LOB Yahoo-UK Limited | — | — | 0 |
| AS203710GB | FRESH-DEV-LTD Fresh Dev Ltd | — | — | 0 |
| AS202443GB | WINE-AS WINE AND FOOD PARTNERS LTD | — | — | 0 |
| AS210467GB | Alncom ALNWICK COMPUTERWARE LTD. | — | — | 0 |
| AS207529GB | NyanLoliNetwork NYANLOLI LTD | — | 573 | 14 |
| AS132865GB | CMSL-AS-AP - Connect Managed Services (UK) Limited | — | — | 0 |
| AS201327GB | H2NET ATN COMMUNICATIONS LIMITED | — | — | 0 |
| AS202110GB | TP-PLC Travis Perkins Trading Company Limited | — | — | 0 |
| AS215397GB | JA-Software-Solutions-Limited JA Software Solutions Limited | — | — | 0 |
| AS214457GB | veesix-networks Veesix Networks Ltd | — | — | 0 |
| AS213509GB | ARESHOSTING ARES HOSTING LIMITED | — | — | 0 |
| AS199748GB | CCN-UK Voneus Ltd | — | — | 0 |
| AS219370GB | Johnson Benjamin Johnson | — | 22 | 7 |
| AS213673GB | WAISE-AS WAISE EUROPE LTD | — | — | 0 |
| AS213526GB | SECURY SECURY INFORMATION TECHNOLOGIES LTD | — | — | 0 |
| AS215989GB | CATFISH Datacamp Limited | — | — | 0 |
| AS50711GB | SYN-ANY SYN LTD | — | — | 0 |
| AS49374GB | BFD-IX Konstantin Verba | — | — | 0 |
| AS218703GB | Tempest TEMPEST OPERATIONS UK LTD | — | — | 0 |
| AS219387GB | ASANTI Asanti Datacentres Limited | — | — | 0 |
| AS219441GB | NEKONODE NEKONODE LTD | — | 2 | 2 |
| AS62267GB | NET365 Talk Straight Ltd. | — | — | 0 |
| AS25127GB | BTOW British Telecommunications Limited | — | — | 0 |
| AS60977GB | NVIDIA-NGN NVIDIA Ltd | — | — | 0 |
| AS43433GB | MICROFROST Christopher Frost | — | — | 0 |
| AS39451GB | IOMART-AS Iomart Managed Services Limited | — | — | 0 |
| AS60547GB | Prostack-Hosting Sharpstack Hosting Ltd | — | — | 0 |
| AS198768GB | OASISINFO-AS OASIS INFOTECH LIMITED | — | 2 | 2 |
| AS206877GB | SharedGrid SharedGrid Ltd | — | 1 | 1 |
| AS49396GB | LLWYNYGORRAS Llwynygorras Cyf | — | — | 0 |
| AS44445GB | AS44445 AS44445 LTD | — | — | 0 |
| AS47718GB | IMSHealth IQVIA SOLUTIONS HQ LTD | — | — | 0 |
| AS49263GB | YourBroadband_UK 4on LTD | — | — | 0 |
| AS215661GB | ANIXNICS ANIXNICS LIMITED | — | — | 0 |
| AS213289GB | iqvia Redcentric Solutions Ltd | — | — | 0 |
| AS199423GB | nexttranslate-as NEXTTRANSLATE LTD | — | — | 0 |
| AS214749GB | PAW James Cahill | — | 7 | 7 |