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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 |
|---|---|---|---|---|
| AS206681GB | IVISTA Ivista Limited | 1K | 524.3K | 2 |
| AS49868GB | ANITE-TRAVEL-SYSTEMS ANITE TRAVEL Ltd | 1K | — | 3 |
| AS20832GB | FUSE2 Southern Communications Ltd | 1K | — | 1 |
| AS43950GB | SPILSBY-AS Terence Froy trading as "Spilsby Internet Solutions" | 1K | 65.5K | 2 |
| AS203573GB | tmcs Tailor Made Technologies Ltd | 1K | — | 1 |
| AS202114GB | Blue_Sky_Systems Blue Sky Systems Limited | 1K | 65.5K | 5 |
| AS205052GB | VISIONDATASOLUTIONS Vision Data Solutions LLP | 1K | 524.3K | 3 |
| AS204264GB | PUREIP Pure IP Limited | 1K | — | 1 |
| AS208330GB | ASBLX BLX Limited | 1K | — | 1 |
| AS203452GB | ImtechUK Swarco UK & Ireland Ltd | 1K | — | 1 |
| AS207072GB | NIGSUN Nigsun Limited | 1K | 262.1K | 2 |
| AS208564GB | bedroq Bedroq Limited | 1K | — | 2 |
| AS61281GB | NDT-AS Chess Limited | 1K | — | 1 |
| AS199462GB | NETISP-UK-AS NETISP LTD | 1K | 655.4K | 13 |
| AS197234GB | stylez STYLEZ AI LTD | 1K | — | 4 |
| AS198312GB | SPECTRAGROUP Spectra Group (uk) Ltd | 1K | 65.5K | 5 |
| AS204236GB | uk-div011 Daniel Ionita | 1K | — | 1 |
| AS205804GB | DELTAV Delta V Technologies Limited | 1K | 65.5K | 10 |
| AS209899GB | NUBIS zananet Limited | 1K | — | 1 |
| AS51318GB | STANDARD-CHARTERED-BANK-AS STANDARD CHARTERED BANK | 1K | — | 4 |
| AS204440GB | farmuk STREAMLAND MEDIA UK LIMITED | 1K | — | 4 |
| AS201024GB | DATAWEBGLOBAL-AS DATAWEB GLOBAL LP. | 1K | — | 2 |
| AS205767GB | Spectron-Services Spectron Services Limited | 1K | — | 1 |
| AS62244GB | WBTSUK-AS Watch Tower Bible and Tract Society of Britain | 1K | 65.5K | 2 |
| AS204258GB | vive-technologies-ltd Vive Technologies Ltd | 1K | 524.3K | 2 |
| AS210087GB | ONTIX Ontix Sites No1 Limited | 1K | — | 1 |
| AS60015GB | CODESTONECLOUD Codestone Solutions Limited | 1K | — | 4 |
| AS201903GB | EVORIO-AS Evorio Limited | 1K | — | 1 |
| AS204247GB | ASDA-UK-AS Asda Stores Limited | 1K | — | 1 |
| AS210279GB | DMT DIGITAL MEDIA TECHNOLOGIES LTD | 1K | — | 1 |
| AS206682GB | lima LIMA Networks Limited | 1K | — | 1 |
| AS209557GB | GEELINX-AS GEELINX LTD | 1K | 4 | 7 |
| AS39610GB | LCH-CLEARNET LCH Group Holdings Limited | 1K | — | 3 |
| AS56637GB | Fixnetix Fixnetix Ltd | 1K | — | 3 |
| AS50489GB | ORIEDGE Radiant Infrastructure 1 Limited | 1K | — | 4 |
| AS20577GB | TRADEWEB TRADEWEB EUROPE LIMITED | 1K | — | 4 |
| AS198306GB | AESL1 AIG Europe (Services) Limited | 1K | — | 3 |
| AS131222GB | UK-ALPHA GamerDating Ltd | 1K | — | 4 |
| AS16362GB | The-London-Metal-Exchange The London Metal Exchange | 1K | — | 3 |
| AS199742GB | Akenai-Products-AS Akenai Products LTD | 1K | 8 | 12 |
| AS208833GB | MYCOMMS MyComms Ltd | 1K | — | 1 |
| AS47492GB | CONSIDERIT Consider IT Limited | 1K | — | 4 |
| AS205734GB | TRAPOC Copart UK Limited | 1K | — | 4 |
| AS201060GB | snetterton SNETTERTON TELECOM LIMITED | 1K | — | 4 |
| AS44824GB | CALLAGENIX-COLO-LONDON COMMI HOLDINGS LIMITED | 1K | — | 1 |
| AS208765GB | Bulletproof Bullet Proof VPN Ltd | 1K | 524.3K | 5 |
| AS58101GB | GLADSERV Gladserv Limited | 1K | 65.6K | 6 |
| AS50432GB | RBS-GBM-UKSTAFF Natwest Markets PLC | 1K | — | 3 |
| AS39173GB | IFDS-AS SS&C FINANCIAL SERVICES INTERNATIONAL LIMITED | 1K | — | 2 |
| AS206062GB | SpaceDataCentres Space Data Centres Ltd | 1K | — | 1 |