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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 |
| AS212238GB | CDNEXT Datacamp Limited | 954.4K | 3,910 |
| 512 |
| 524.3K |
| 4 |
| AS51762GB | BDC-ADV-UK Adversor LLP | 512 | — | 2 |
| AS59876GB | SHELFSPACE Thomas James Elliott | 512 | 1 | 3 |
| AS43486GB | MSUI1-AS Mizuho Bank Ltd | 512 | — | 2 |
| AS209809GB | ROCO-HOST ROCO HOST LTD | 512 | 1 | 3 |
| AS44480GB | Brevan-Howard-AS Brevan Howard Asset Management LLP | 512 | — | 2 |
| AS203107GB | Gemini-Exchange GEMINI PAYMENTS UK, LTD | 512 | — | 2 |
| AS204910GB | ORG-SNL103-RIPE SUDATECH NETWORKS LIMITED | 512 | 16 | 3 |
| AS203652GB | IBMUK IBM United Kingdom Limited | 512 | — | 2 |
| AS209413GB | DEDIK-CH DEDIK SERVICES LIMITED | 512 | — | 2 |
| AS211760GB | CCL-LDN Cleveland Clinic London Ltd | 512 | — | 2 |
| AS206822GB | CLOUDNET Clouvider Limited | 512 | — | 2 |
| AS208638GB | mimecast-it-corp Mimecast Services Limited | 512 | — | 2 |
| AS214453GB | jandutech Beon Core Ltd | 512 | — | 2 |
| AS48761GB | MAXINAMES Maxinames Ltd | 512 | — | 2 |
| AS205359GB | precisely-ltd Precisely Software Ltd | 512 | — | 2 |
| AS51823GB | MTNETWORKSLTD Microtalk Europe Ltd | 512 | — | 2 |
| AS59724GB | REED-ELSEVIER-EMEA-GCC Elsevier Limited | 512 | — | 2 |
| AS197860GB | NET-HARUKA Haruka Network Limited | 512 | 33 | 5 |
| AS31743GB | IPGGIS-UK-AS Interpublic GIS (UK) Ltd | 512 | 524.3K | 3 |
| AS51329GB | CONNET-AS CONNECTION NETWORKS L.P. | 512 | — | 2 |
| AS49503GB | IDE-GROUP-MANAGE MAINFRAME & CYBERNETIC SYSTEMS LIMITED | 512 | — | 1 |
| AS212158GB | TransFICC TransFICC Ltd. | 512 | — | 2 |
| AS203795GB | uk-fidelis-1-as FIDELIS MARKETING LIMITED | 512 | — | 2 |
| AS215162GB | TROOLI Trooli Ltd. | 512 | 512 | 4 |
| AS197283GB | PowerRDP-Network-AS PowerRDP Network LTD | 512 | — | 2 |
| AS214861GB | CloudExa-Hosting CloudExa-Hosting LTD | 512 | — | 2 |
| AS199379GB | MARKERSTUDY-AS Markerstudy Insurance Services Limited | 512 | — | 2 |
| AS59410GB | BARRITEC Barritel Ltd | 512 | 65.5K | 3 |
| AS41596GB | WGSL-AS Willis Group Services Ltd | 512 | — | 2 |
| AS212656GB | UK-3VEREST 3verest Limited | 512 | — | 2 |
| AS200008GB | PIRUM-AS Pirum Systems Limited | 512 | 524.3K | 3 |
| AS212329GB | NETCRAFT Netcraft Ltd | 512 | 2 | 4 |
| AS199204GB | WebMate Webmate Internet Services Ltd. | 512 | — | 1 |
| AS200203GB | DATABRIDGE GLOBAL DATA BRIDGE INTERNATIONAL LIMITED | 512 | 8.2K | 4 |
| AS41839GB | ConcentrixEuropeLtd Concentrix Europe Limited | 512 | — | 2 |
| AS25050GB | BACS-AS VOCALINK LTD | 512 | — | 1 |
| AS211020GB | asrokatansky LOBOS NETWORKING LTD | 512 | — | 2 |
| AS214557GB | hostmenow HOSTMENOW LTD | 512 | — | 2 |
| AS203767GB | CLARITAS-A Claritas Solutions Limited | 512 | — | 2 |
| AS200623GB | NetBlazer-Ltd NetBlazer Ltd | 512 | 18 | 5 |
| AS212152GB | AS-Beazley Beazley Management Limited | 512 | — | 2 |
| AS215662GB | KENSINGTON KENSINGTON MORTGAGE COMPANY LIMITED | 512 | — | 2 |
| AS205900GB | APC-Solutions APC Solutions UK Ltd | 512 | — | 2 |
| AS211476GB | techloq-uk Techloq Limited | 512 | 65.5K | 3 |
| AS204322GB | uk-nyt-lhr1 New York Times Limited | 512 | — | 1 |
| AS207701GB | DataGrid Talia Limited | 512 | 1 | 3 |