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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.
3,143 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications Limited | 2.1M | 63 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 172 |
| AS212238GB | CDNEXT Datacamp Limited | 1.2M | 4,613 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 404 |
| — |
| 14 |
| AS211612GB | cache77 Datacamp Limited | 3.6K | 66.1K | 15 |
| AS59888GB | Marmin MARMIN Ltd | 3.6K | 524.3K | 5 |
| AS61419GB | THECLOUDSIMPLIFIED The Cloud Simplified Limited | 3.6K | — | 4 |
| AS218239GB | ANTIDDOS-NETWORKS-AS AntiDDoS Networks LTD | 3.6K | — | 14 |
| AS24594GB | FSYS Voiceflex Ltd | 3.6K | 65.5K | 5 |
| AS47563GB | SIS-AS Sports Information Services Limited | 3.6K | — | 6 |
| AS39175GB | CONNECTIVE Connective Online Limited | 3.6K | 524.3K | 8 |
| AS213990GB | AOFB AOFB Telecom Networks Ltd | 3.6K | — | 14 |
| AS202161GB | PGDS-ASN1 M&G INVESTMENT MANAGEMENT LIMITED | 3.6K | — | 14 |
| AS41203GB | GEOPOST DPDgroup UK Ltd | 3.8K | — | 8 |
| AS213001GB | LA5 LA5 Digital LTD | 3.8K | — | 13 |
| AS41495GB | FAELIX Faelix Limited | 3.8K | 655.4K | 8 |
| AS39208GB | IPILimited I.P. Integration Limited | 3.8K | 589.8K | 11 |
| AS20878GB | AS-ATIA MeetingZone Limited | 3.8K | — | 5 |
| AS39884GB | VOIPFONE-AS iNet Telecoms Ltd | 3.8K | — | 4 |
| AS25421GB | JOHN-LEWIS-AS John Lewis Plc. | 3.8K | — | 9 |
| AS61414GB | EDGENAP EDGENAP LTD | 3.8K | 1 | 15 |
| AS30938GB | abstation ahbr company limited | 3.8K | — | 5 |
| AS200751GB | Entigy Entigy Ltd | 3.8K | — | 4 |
| AS50113GB | SuperServersDatacenter FIRST SERVER LIMITED | 3.8K | 786.5K | 38 |
| AS198823GB | NETINT Network Integration Technologies LTD | 3.8K | — | 5 |
| AS8282GB | BINK Bink Group Ltd | 3.8K | 65.5K | 11 |
| AS15692GB | RAZORBLUE Razorblue Ltd | 4.1K | 524.3K | 14 |
| AS214271GB | QTNETWORK ICONIC PROTECH LTD | 4.1K | — | 16 |
| AS15770GB | DERWENTSIDE Durham County Council | 4.1K | — | 1 |
| AS31198GB | Space-Norway-UK-Ltd SPACE NORWAY (UK) LIMITED | 4.1K | — | 8 |
| AS28886GB | RETN-LV RETN Limited | 4.1K | 65.5K | 2 |
| AS39202GB | GCAP-AS Global Radio Limited | 4.1K | 65.5K | 2 |
| AS30847GB | LUNS-AS Lancaster University Network Services Limited | 4.1K | 65.5K | 2 |
| AS211140GB | TRANSUNION-INTERNATIONAL-UK-LIMITED TRANSUNION INTERNATIONAL UK LIMITED | 4.1K | — | 9 |
| AS203231GB | V4VoIP Vanquish Global Trading Ltd | 4.1K | — | 1 |
| AS59659GB | SECURUS Securus Communications Ltd. | 4.1K | 524.3K | 4 |
| AS16376GB | SYSGROUP-PLC SysGroup plc | 4.1K | — | 4 |
| AS210814GB | VUNIFY VUNIFY LTD | 4.1K | 5 | 21 |
| AS20976GB | HOTLINKS-AS Domainmaster LTD | 4.1K | — | 1 |
| AS56718GB | INTOUCH-BROADBAND Redshelf Ltd | 4.1K | 196.6K | 14 |
| AS205039GB | BeaconBroadband Beacon Broadband LTD | 4.1K | — | 16 |
| AS29120GB | ROWEMAW-AS Mayer Brown International LLP | 4.1K | — | 10 |
| AS57022GB | DATAVITA-AS HFD DATAVITA LIMITED | 4.1K | 1 | 13 |
| AS59565GB | CRONOS-AS Cronos Internet Ltd | 4.1K | 65.5K | 4 |
| AS21218GB | EBCGROUP EBC Group (UK) Ltd | 4.1K | — | 1 |
| AS41896GB | SHETTEL-AS Shetland Islands Council | 4.1K | — | 10 |
| AS204239GB | UK-Abzorb Abzorb Group Ltd | 4.1K | — | 4 |
| AS47351GB | REDTECH Red Technology Solutions Limited | 4.1K | — | 4 |
| AS210258GB | Wildanet Wildanet Ltd | 4.1K | 774.1K | 69 |
| AS59953GB | PUREFIBRE-AS Purefibre Internet Ltd. | 4.1K | 524.3K | 4 |