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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.
3,134 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 | 368 |
| AS212238GB | CDNEXT Datacamp Limited | 1.1M | 4,229 |
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| AS201941GB | SWANN-AS NHS National Services Scotland | — | — | 0 |
| AS203276GB | JAMINIT James Cook | — | — | 0 |
| AS206144GB | NA-Transit Clouvider Limited | — | — | 0 |
| AS208242GB | JM-HOME Jacob Mansfield | — | — | 0 |
| AS216179GB | NATE-BILL Nathaniel Bill | — | — | 0 |
| AS6728GB | NILDRAM TalkTalk Communications Limited | — | — | 0 |
| AS214332GB | IXMidlands-Route-Servers Exascale Ltd | — | — | 0 |
| AS35433GB | Zzoomm Full Fibre Limited | — | — | 0 |
| AS203981GB | DIXIPAY-AS DIXIPAY LTD | — | — | 0 |
| AS216217GB | baltic Baltic Networks Limited | — | — | 0 |
| AS219294GB | RUNWARE Runware Ltd | — | — | 0 |
| AS8709GB | VF-VPNPLUS Vodafone Enterprise Equipment Limited | — | — | 0 |
| AS60710GB | NCL-IX-RS Stellium Networks Limited | — | — | 0 |
| AS44008GB | RBKC Royal Borough of Kensington and Chelsea | — | — | 0 |
| AS58124GB | SIXDG-CSG Six Degrees Technology Group Limited | — | — | 0 |
| AS198536GB | LUDIC-LABS Bekalu Terefe | — | — | 0 |
| AS201038GB | MPARA1 Matteo Paramatti | — | — | 0 |
| AS202631GB | LINX-GVPP London Internet Exchange Ltd. | — | — | 0 |
| AS213190GB | STACLAR-CARRIER Staclar Carrier Ltd. | — | — | 0 |
| AS205328GB | spirit The Spiritual Agency, private company limited by guarantee | — | — | 0 |
| AS208585GB | CSSUK Clear Street Services UK LTD | — | — | 0 |
| AS209756GB | Msphere Msphere Ltd | — | — | 0 |
| AS214005GB | MAINSTREAM-CIR-AS Mainstream Digital Ltd | — | — | 0 |
| AS215086GB | BONZI Alfred Foster | — | — | 0 |
| AS218763GB | MPHMEDIA MPH MEDIA & TECH LTD | — | — | 0 |
| AS51901GB | KECONNECT Digital Space Group Limited | — | — | 0 |
| AS42330GB | UNCHAINEDISP Unchained ISP Limited | — | — | 0 |
| AS49999GB | BANDWIDTHTECH-AS Hydra Communications Ltd | — | — | 0 |
| AS210090GB | PIPER-AS Zack Piper | — | — | 0 |
| AS210727GB | BuyLtd Buy Limited | — | — | 0 |
| AS209536GB | Marex-SA-AS Spectron Services Limited | — | — | 0 |
| AS210996GB | HO-LECN-GUC UK Home Office (The Secretary of State for the Home Department) | — | — | 0 |
| AS215905GB | AS_10VPN_ANYCAST 10VPN Research Network LTD | — | — | 0 |
| AS218770GB | MLFTECH MLF TECH SUPPORT LIMITED | — | — | 0 |
| AS21356GB | XchangePointMLP GTT - EMEA Ltd. | — | — | 0 |
| AS31631GB | ELEVATE Telcom Networks Limited | — | — | 0 |
| AS44360GB | IPASSETS Bink Group Ltd | — | — | 0 |
| AS6763GB | SKY-GROUP-BACKBONE-AS Sky UK Limited | — | — | 0 |
| AS61245GB | lovehosting Yorkshire Tech Limited | — | — | 0 |
| AS57276GB | OPTIMITY Vorboss Limited | — | — | 0 |
| AS200681GB | IXMIDS-ROUTESRV IX Midlands Ltd | — | — | 0 |
| AS203902GB | LHBBC-UK Peter Buneman | — | — | 0 |
| AS205552GB | AS_BITS LOTS OF BITS LTD | — | — | 0 |
| AS205374GB | NEXUSHOST NexusHost LTD | — | — | 0 |
| AS207924GB | AS207924 WideFM Ltd | — | — | 0 |
| AS210440GB | Akaere-NetWork AKAERE NETWORKS TECHNOLOGY LTD | — | — | 0 |