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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 |
| 512 |
| 16 |
| 3 |
| AS210404GB | TUNSTALL-UK Tunstall Healthcare (UK) Limited | 512 | — | 2 |
| AS202310GB | hyve-corp Hyve Ltd | 512 | 2 | 2 |
| AS212660GB | WHG-DXB1 WHG Hosting Services Ltd | 512 | — | 2 |
| AS205177GB | IVANTI-UK IVANTI UK LIMITED | 512 | — | 1 |
| AS219326GB | SULAVIL SULAVI LTD | 512 | — | 2 |
| AS35559GB | SOMEADDRESS Someaddress Networks Ltd | 512 | 2 | 2 |
| AS51222GB | CMC-MARKETS-PLC CMC MARKETS PLC | 512 | — | 2 |
| AS212797GB | UK-PERFORMCONTENT Perform Content Services Limited | 512 | — | 1 |
| AS214670GB | NOMETRIC-NET No Metric Limited | 512 | 131.1K | 4 |
| AS203812GB | GlobalDirectDeliveryLtd High Availability Hosting Limited | 512 | — | 2 |
| AS61093GB | SC Solution Computers Ltd | 512 | — | 2 |
| AS206166GB | SCHRODERS-UK-AS Schroder Investment Management Limited | 512 | — | 2 |
| AS200623GB | NetBlazer-Ltd NetBlazer Ltd | 512 | 2 | 4 |
| AS216307GB | HYPERHOST-AS Hyperhost Solutions Limited | 512 | 1 | 3 |
| AS198032GB | UCLES-AS Cambridge Assessment | 512 | — | 2 |
| AS204550GB | continental-ltd Continental Limited | 512 | 65.5K | 3 |
| AS206479GB | AceRDP AceRDP Ltd | 512 | — | 2 |
| AS33981GB | TSYS-AS Total System Services Processing Europe Limited | 512 | — | 2 |
| AS214056GB | FUTURETECH Future Technology Group Ltd | 512 | — | 2 |
| AS206143GB | asn-networked2 Networked Creativity LLP | 512 | — | 2 |
| AS39150GB | HOSTING-TELECOM-AS HOSTING TELECOM LTD | 512 | 327.7K | 7 |
| AS208781GB | UK-SMARTCT1-20190320 SMART CT LIMITED | 512 | — | 1 |
| AS202297GB | SKYLON Skylon Solutions Limited | 512 | 65.6K | 8 |
| AS202067GB | advantex Advantex Network Solutions Ltd | 512 | — | 2 |
| AS204777GB | telent telent Technology Services Ltd | 768 | — | 3 |
| AS216311GB | NORYLIX-AS NORYLIX LTD | 768 | — | 3 |
| AS206822GB | CLOUDNET Clouvider Limited | 768 | — | 3 |
| AS211955GB | NOTBADHOSTING NOTBAD HOSTING LTD | 768 | — | 3 |
| AS41415GB | square-enix Square Enix Limited | 768 | — | 3 |
| AS205944GB | ISAM1 ISAM FUNDS (UK) LIMITED | 768 | — | 3 |
| AS202154GB | brevanhoward Brevan Howard Asset Management LLP | 768 | — | 3 |
| AS202901GB | NETCALL Netcall Technology Limited | 768 | — | 3 |
| AS59920GB | LUSORY Lusory Limited | 768 | 4.1K | 4 |
| AS43408GB | OCD-UK Orange Cyberdefense UK Limited | 768 | 1 | 4 |
| AS42457GB | ascdck1 CARDOCK HOSTING LIMITED | 768 | — | 3 |
| AS210054GB | TNCG NCG Energy Ltd | 768 | 1M | 7 |
| AS210511GB | blue-telecoms Direct Market Solutions Limited | 768 | — | 3 |
| AS206483GB | REDMATTER Red Matter Limited | 768 | — | 3 |
| AS44548GB | CMCMarkets-AS CMC MARKETS PLC | 768 | — | 3 |
| AS206024GB | Far-UK-DualHoming RELX GROUP PLC | 768 | — | 2 |
| AS199492GB | EASYINTERNET Easy Internet Solutions Limited | 768 | — | 2 |
| AS206798GB | UK-Huawei HUAWEI TECHNOLOGIES(UK)CO.,LTD | 768 | — | 2 |
| AS212890GB | AetherCloud ONEMAN NETWORK LIMITED | 768 | 5 | 8 |
| AS213905GB | ISPLABS ISPLABS LIMITED | 768 | 22 | 10 |
| AS40992GB | MAREX Marex Financial Ltd | 768 | — | 2 |
| AS212169GB | TECH-RMMINET CARDOCK HOSTING LIMITED | 768 | — | 3 |