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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 | 289 |
| AS2856GB | BT-UK-AS British Telecommunications Limited | 18.4M | 543 |
| AS13285GB | OPALTELECOM-AS TalkTalk Communications Limited | 7.7M | 99 |
| AS786GB | JANET - Jisc Services Limited | 7M | 219 |
| AS5607GB | BSKYB-BROADBAND-AS Sky UK Limited | 6.4M | 79 |
| 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 |
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.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS214438GB | nexgen-ca1 NexGen Cloud Ltd | 4.1K | — | 16 |
| AS8789GB | NOV-AS TELEFONICA TECH NORTHERN IRELAND LIMITED | 4.1K | — | 1 |
| AS214266GB | ZERODESK-LTD ZERODESK LTD | 4.1K | 12.9M | 45 |
| AS211140GB | TRANSUNION-INTERNATIONAL-UK-LIMITED TRANSUNION INTERNATIONAL UK LIMITED | 4.1K | — | 9 |
| AS35200GB | TransitX-Ltd TransitX Ltd | 4.1K | — | 16 |
| AS39630GB | Asptech Asptech IT Solutions Ltd | 4.1K | — | 9 |
| AS209336GB | GBWS GB Wholesale Networks LTD | 4.1K | 1 | 11 |
| AS44521GB | Jagex-as Jagex Limited | 4.1K | — | 14 |
| AS60542GB | NEXT Next Internet Network Ltd | 4.1K | — | 16 |
| AS20878GB | AS-ATIA MeetingZone Limited | 3.8K | — | 5 |
| AS205220GB | RHC-Hosting RH & Co. IT Services Ltd | 3.8K | — | 15 |
| AS205098GB | CGUK Cloud Gateway Limited | 3.8K | — | 7 |
| AS41203GB | GEOPOST DPDgroup UK Ltd | 3.8K | — | 8 |
| AS21301GB | UK-NATWEST-AS21301 Natwest Markets PLC | 3.8K | — | 10 |
| AS198823GB | NETINT Network Integration Technologies LTD | 3.8K | — | 5 |
| AS216039GB | AntiDDoS-pw EdgeSec Technologies Limited | 3.8K | 129 | 18 |
| AS39208GB | IPILimited I.P. Integration Limited | 3.8K | 589.8K | 11 |
| AS29400GB | TULLETT-AS TP ICAP GROUP SERVICES LIMITED | 3.8K | — | 13 |
| AS41495GB | FAELIX Faelix Limited | 3.8K | 655.4K | 8 |
| AS200751GB | Entigy Entigy Ltd | 3.8K | — | 4 |
| AS25421GB | JOHN-LEWIS-AS John Lewis Plc. | 3.8K | — | 9 |
| AS8282GB | BINK Bink Group Ltd | 3.8K | 65.5K | 11 |
| AS30938GB | abstation ahbr company limited | 3.8K | — | 5 |
| AS50113GB | SuperServersDatacenter FIRST SERVER LIMITED | 3.8K | 786.5K | 38 |
| AS202161GB | PGDS-ASN1 M&G INVESTMENT MANAGEMENT LIMITED | 3.6K | — | 14 |
| AS204413GB | HYVE-UK Hyve Ltd | 3.6K | 4 | 10 |
| AS42705GB | Talia Talia Limited | 3.6K | — | 14 |
| AS213354GB | International-Hosting-Solutions-AS INTERNATIONAL HOSTING SOLUTIONS LLP | 3.6K | 256 | 7 |
| AS59888GB | Marmin MARMIN Ltd | 3.6K | 524.3K | 5 |
| AS47563GB | SIS-AS Sports Information Services Limited | 3.6K | — | 6 |
| AS28939GB | ARM-AS ARM Ltd | 3.6K | — | 14 |
| AS41847GB | STEALTH-NETWORKS Daniel O'Mahony | 3.6K | 1 | 10 |
| AS39175GB | CONNECTIVE Connective Online Limited | 3.6K | 524.3K | 8 |
| AS211612GB | cache77 Datacamp Limited | 3.6K | 66.1K | 12 |
| AS41896GB | SHETTEL-AS Shetland Islands Council | 3.6K | — | 8 |
| AS62059GB | CONWAYBB16-AS Turbo Leisure Ltd | 3.6K | 65.5K | 4 |
| AS57148GB | TBSH-CLIENT-TRISTAR-BYTEHOUSE Bytehouse Ltd | 3.6K | — | 5 |
| AS24594GB | FSYS Voiceflex Ltd | 3.6K | 65.5K | 5 |
| AS35707GB | Scottish-Power-PLC Scottish Power UK PLC | 3.6K | — | 5 |
| AS41362GB | BGNET Royal London Management Services Limited | 3.6K | — | 13 |
| AS207045GB | wyless_asn_1 KORE WIRELESS UK LIMITED | 3.6K | — | 8 |
| AS39884GB | VOIPFONE-AS iNet Telecoms Ltd | 3.6K | — | 3 |
| AS61419GB | THECLOUDSIMPLIFIED The Cloud Simplified Limited | 3.6K | — | 4 |
| AS56382GB | VSERVERLTD vServer.site LTD | 3.6K | 23 | 22 |
| AS57168GB | ICH-AS Amito Ltd | 3.6K | — | 9 |
| AS213702GB | QWINS-LTD QWINS LTD | 3.6K | 112 | 21 |
| AS207567GB | INTEZIONET-AS Intezio Worldwide Limited | 3.6K | 2 | 16 |
| AS43013GB | YorkDataServices Communicate Technology LTD | 3.6K | — | 3 |
| AS57994GB | ASN-IDCNET NetEarth UK Ltd | 3.6K | — | 14 |
| AS49546GB | VOICETEC-AS Voicetec sys Limited | 3.3K | — | 7 |