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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 | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 171 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 332 |
| AS212238GB | CDNEXT Datacamp Limited | 968.4K | 3,979 |
| 1.5K |
| — |
| 6 |
| AS35831GB | VNETRIX-AS Vnetrix Ltd | 1.8K | — | 6 |
| AS41099GB | globalreach Global Reach Networks Limited | 1.8K | — | 7 |
| AS56718GB | INTOUCH-BROADBAND Redshelf Ltd | 1.8K | 131.6K | 11 |
| AS197246GB | BELGRAVIA-AS BELGRAVIA MEDIA LTD | 1.8K | — | 7 |
| AS203185GB | PebbleTree PEBBLETREE LTD | 1.8K | 3 | 10 |
| AS202454GB | PINE-MEDIA Pine Media Ltd | 1.8K | — | 7 |
| AS203154GB | MITELIS-DOWNSTREAM MITELIS SECURITY LIMITED | 1.8K | — | 7 |
| AS29474GB | GHOTI-AS Ghoti Limited | 1.8K | — | 4 |
| AS210893GB | LAYEREDTECH Layered Technologies Limited | 1.8K | 524.3K | 8 |
| AS213495GB | SERVITRO-LTD SERVITRO LTD | 1.8K | 1 | 8 |
| AS211029GB | XTX XTX Markets Limited | 1.8K | — | 4 |
| AS208507GB | MitsubishiHC-Capital Mitsubishi HC Capital UK PLC | 1.8K | — | 5 |
| AS204154GB | FIRST-SERVER-US-AS FIRST SERVER LIMITED | 1.8K | 1 | 7 |
| AS197715GB | Serverbike Serverbike LTD | 1.8K | 2 | 9 |
| AS48273GB | ESSENSYS ESSENSYS (UK) Ltd. | 1.8K | — | 7 |
| AS48447GB | Sectigo Sectigo Limited | 1.8K | 65.5K | 5 |
| AS57228GB | AXIANS-UK-AS Axians Networks Limited | 1.8K | — | 7 |
| AS204562GB | ASJavelin JAVELIN BROADBAND LIMITED | 1.8K | 524.3K | 5 |
| AS213734GB | ZERODESK-LTD ZERODESK LTD | 1.8K | — | 7 |
| AS42237GB | w1n w1n ltd | 1.8K | 655.4K | 17 |
| AS42944GB | TICKETMASTER-EU Ticketmaster UK Limited | 1.8K | — | 7 |
| AS198990GB | PINEHOST-NET Pine Hosting LTD | 1.8K | — | 4 |
| AS198386GB | ONI THRIVE OPERATIONS LIMITED | 1.8K | — | 4 |
| AS201715GB | ineedbr Ineedbroadband Ltd | 1.8K | — | 4 |
| AS60841GB | BERRYBYTE berrybyte Limited | 1.8K | 258 | 10 |
| AS48866GB | NETCRACKER-EMEA-AS Netcracker Technology EMEA Limited | 1.8K | — | 7 |
| AS49418GB | AS-NETSHIELD NETSHIELD LTD | 1.8K | 67 | 11 |
| AS209505GB | UNCHAINEDISP Unchained ISP Limited | 1.8K | 344.1K | 7 |
| AS206715GB | UXHOST UXHOST LTD | 1.8K | 19 | 11 |
| AS207087GB | pay360 Pay360 Ltd | 2K | — | 5 |
| AS50422GB | RBS-GBM Natwest Markets PLC | 2K | — | 6 |
| AS44971GB | GOETEC-AS University of Kent | 2K | 4.1K | 2 |
| AS47704GB | ACADEMIA-AS Academia Ltd | 2K | 524.3K | 4 |
| AS34499GB | BlackBox-LINX BlackBox Hosting Ltd | 2K | — | 5 |
| AS202312GB | SMBCNIKKOCM SMBC Bank International plc | 2K | 65.5K | 7 |
| AS35838GB | CCANET CCANET Limited | 2K | — | 1 |
| AS197370GB | NOTTSCC Nottinghamshire County Council | 2K | — | 1 |
| AS43950GB | SPILSBY-AS Terence Froy trading as "Spilsby Internet Solutions" | 2K | 65.5K | 2 |
| AS41400GB | GNOL-AS R.M. Wotton T/A G-Net Online | 2K | 524.3K | 3 |
| AS50202GB | HISCOXGROUP-AS Hiscox Underwriting Group Services Ltd | 2K | — | 4 |
| AS199954GB | Techwareca Techwareca Ltd. | 2K | 524.3K | 2 |
| AS60736GB | The-Internet-Group KOCHO GROUP LIMITED | 2K | — | 3 |
| AS39103GB | as_moat Moat Homes Limited | 2K | — | 3 |
| AS206411GB | FASTWARP-LLP Fastwarp LLP | 2K | — | 8 |
| AS27263GB | NUHL - NATURA &Co UK HOLDINGS LIMITED | 2K | — | 2 |
| AS200147GB | ASHTL Hosting Techniques Limited | 2K | — | 3 |