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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 | 4,290 |
| 2K |
| 524.3K |
| 5 |
| AS42536GB | Deloitte-UK Deloitte LLP | 2K | — | 1 |
| AS203372GB | GSACAPITAL-EU-AS GSA Capital Services Ltd | 2K | — | 3 |
| AS47113GB | SLP Suffolk Life Pensions Limited | 2K | — | 1 |
| AS35299GB | ASC2k C2k | 2K | — | 1 |
| AS205502GB | Inception Inception Hosting Limited | 2K | — | 8 |
| AS209761GB | NECS North of England Commissioning Support Unit | 2K | — | 3 |
| AS21188GB | UNILEVER-ES-UK Unilever PLC | 2K | — | 4 |
| AS34922GB | NETNAMES CSC Administrative Services Limited | 2K | — | 5 |
| AS42466GB | METEORIC-AS Meteoric Ltd | 2K | — | 1 |
| AS21422GB | CONNECT-LIVERPOOL Connect internet Solutions Limited | 2K | — | 1 |
| AS43534GB | CREDITCALL Network Merchants Limited | 2K | — | 5 |
| AS199710GB | PERFORM-AS DAZN MEDIA SERVICES LIMITED | 2K | 2 | 8 |
| AS213495GB | SERVITRO-LTD SERVITRO LTD | 2K | 1 | 9 |
| AS206411GB | FASTWARP-LLP Fastwarp LLP | 2K | — | 8 |
| AS207087GB | pay360 Pay360 Ltd | 2K | — | 5 |
| AS201358GB | FNZ-UK FNZ (UK) Ltd | 2K | — | 3 |
| AS50948GB | amdocs-uk-dc-as AMDOCS (UK) LIMITED | 2K | — | 6 |
| AS207195GB | ipwholesale Intelligent Exchanges Limited | 2K | 524.3K | 4 |
| AS201933GB | AS4NET 4net Technologies Ltd | 2K | 524.3K | 5 |
| AS50063GB | SAINSBURYS-NET Sainsbury's Supermarkets Ltd | 2K | — | 1 |
| AS202312GB | SMBCNIKKOCM SMBC Bank International plc | 2K | 65.5K | 7 |
| AS206547GB | CDK-Global-EU Keyloop Holdings (UK) Limited | 2K | — | 4 |
| AS21448GB | MWIL Integrated Digital Services Ltd | 2K | — | 2 |
| AS12290GB | EXONETRIC Exonetric Consulting Ltd | 2K | 65.5K | 2 |
| AS215262GB | CLOUDNORD-UKNODE-AS Cloud Nord Limited | 2K | 18 | 9 |
| AS56718GB | INTOUCH-BROADBAND Redshelf Ltd | 2K | 197.1K | 12 |
| AS205309GB | prodec_networks Prodec Networks Ltd | 2K | — | 3 |
| AS34746GB | AXA_INSURANCE AXA Insurance UK plc | 2K | — | 1 |
| AS8444GB | HENDERSON JANUS HENDERSON ADMINISTRATION UK LIMITED | 2K | — | 8 |
| AS203842GB | AcoraAPC-AS Acora Limited | 2K | — | 2 |
| AS56460GB | O2-WIFI-AS Telefonica UK Limited | 2K | — | 2 |
| AS202466GB | qbeeo QBE Management Services (UK) Limited | 2K | — | 5 |
| AS201714GB | LinkIPNetworks Link IP Networks Ltd | 2.3K | — | 6 |
| AS203204GB | SERVICEDCLOUD Serviced Cloud Ltd | 2.3K | — | 3 |
| AS199286GB | ANS-AS Abtec Network Systems LTD | 2.3K | — | 3 |
| AS35327GB | NAGLOTECH Naglotech Limited | 2.3K | 1 | 6 |
| AS34654GB | IONIC-AS Merula Limited | 2.3K | — | 2 |
| AS47582GB | ansonnet-as-uk ANSON NETWORK LIMITED | 2.3K | — | 3 |
| AS33970GB | M247 M247 Ltd | 2.3K | — | 6 |
| AS50152GB | IMED Intermedia Technologies Company Limited | 2.3K | — | 4 |
| AS206352GB | MEDIACONNECTIVE Media Connective LLP | 2.3K | — | 5 |
| AS201536GB | SANDYXHOSTING-AS SANDYX SYSTEMS LIMITED | 2.3K | 524.3K | 18 |
| AS211552GB | CIVO-UK Civo LTD | 2.3K | 65.5K | 3 |
| AS213702GB | QWINS-LTD QWINS LTD | 2.3K | 112 | 16 |
| AS50385GB | HALOCLOUD-NETWORK HaloCloud Network Limited | 2.3K | 2.4K | 17 |
| AS214467GB | digided-as DIGIDED LTD | 2.3K | — | 9 |