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Cumulative IPv4, IPv6, and ASN allocations to United Kingdom over time.
Share of announced address space covered by valid Route Origin Authorizations.
3,123 autonomous systems registered to United Kingdom. Click an AS for detail.
| 102.9K |
| 528.4K |
| 44 |
| AS16247GB | M247-UK Convergence Group (Wireless) Networks Limited | 100.4K | 98.3K | 231 |
| AS12701GB | BARCAP Barclays Bank plc | 99.6K | — | 31 |
| AS5503GB | RMIFL RM Education Ltd | 99.3K | 65.5K | 41 |
| AS58065GB | PacketExchange Orion Network Limited | 97.3K | 7 | 384 |
| AS25160GB | VORBOSS Vorboss Limited | 97K | 1.6M | 37 |
| AS214143GB | skydigital-telecom SKYDIGITAL TELECOM LTD | 96.8K | — | 270 |
| AS42973GB | METRONETUK_M24SEVEN Convergence Group (Wireless) Networks Limited | 96K | — | 63 |
| AS21267GB | Wavenet-AS21267 Wavenet Limited | 89.9K | 65.5K | 65 |
| AS31515GB | AS-INMARSAT Inmarsat Global Limited | 87.6K | 65.5K | 55 |
| AS24867GB | Adapt-AS Rackspace Ltd. | 86.3K | — | 14 |
| AS29550GB | SIMPLYTRANSIT Team Blue Carrier Limited | 85K | 65.5K | 12 |
| AS48101GB | TROOLI-AS Trooli Ltd. | 82.7K | 459K | 73 |
| AS61323GB | UKFAST ANS ACADEMY LIMITED | 82.4K | 589.8K | 65 |
| AS2818GB | BBC BBC | 81.9K | 196.6K | 7 |
| AS60187GB | LGFL-AS London Grid for Learning Trust | 81.7K | 786.4K | 49 |
| AS8680GB | SURE-International-Limited Sure (Guernsey) Limited | 81.4K | 655.4K | 72 |
| AS16082GB | SPITFIRE Spitfire Network Services Limited | 79.9K | 65.5K | 13 |
| AS51561GB | AS-ICUK ICUK Computing Services Limited | 79.1K | 65.5K | 71 |
| AS31727GB | NODE4-AS Node4 Limited | 77.8K | 131.1K | 144 |
| AS8435GB | LBG_INTERNET_EDGE Lloyds Banking Group PLC | 77.1K | — | 47 |
| AS35575GB | VAIONI Vaioni Group Ltd | 73.2K | 131.1K | 38 |
| AS3223GB | VOXILITY Voxility LLP | 73.2K | 283 | 261 |
| AS24775GB | AS24775 Qinetiq Limited | 69.6K | — | 2 |
| AS21296GB | ASN-PwC-UK Pricewaterhousecoopers Services Limited | 67.1K | — | 7 |
| AS30740GB | EXA-NETWORKS Exa Networks Limited | 67.1K | 524.3K | 5 |
| AS50292GB | STRATOGEN Access UK Ltd | 66.8K | — | 37 |
| AS39400GB | LBH-AS London Borough of Hackney | 65.8K | — | 2 |
| AS201773GB | UOW-AS University of Warwick | 65.8K | — | 2 |
| AS15601GB | Baring Investment Services Ltd | 65.5K | — | 1 |
| AS212655GB | youfibre YouFibre Limited | 65.3K | 524.5K | 40 |
| AS202596GB | GNETWORK GNC Realisations 2026 Limited | 64.3K | — | 49 |
| AS212465GB | COMCAST-UK-2 Comcast International Holdings UK Limited | 62.5K | 38 | 20 |
| AS215540GB | GCS-AS GLOBAL CONNECTIVITY SOLUTIONS LLP | 61.7K | 36 | 263 |
| AS29107GB | SYNAPSE-AS Synapse Network LTD | 58.9K | 2 | 25 |
| AS48945GB | IFNL-AS OPEN FIBRE NETWORKS (WHOLESALE) LIMITED | 58.4K | 524.3K | 42 |
| AS4455GB | BSO IX Reach Ltd | 57.6K | 229.9K | 43 |
| AS59395GB | EFAR-AS Southern Communications Ltd | 56.6K | 1.1M | 28 |
| AS5482GB | AS5482 AllPoints Fibre Limited | 56.3K | 632.8K | 31 |
| AS35425GB | BYTEMARK-AS Iomart Managed Services Limited | 55.8K | 720.9K | 26 |
| AS25577GB | C4L-AS MAINFRAME & CYBERNETIC SYSTEMS LIMITED | 55.6K | 65.5K | 55 |
| AS205544GB | LEASEWEB-UK-LON-11 Leaseweb UK Limited | 55.3K | 12.2M | 89 |
| AS15533GB | SASEUROPE Redcentric Solutions Ltd | 52.5K | 131.1K | 17 |
| AS214432GB | ZLIDC Zhilian Technology CO., LTD. | 51.5K | 2 | 190 |
| AS39356GB | Avanti-UK-AS Avanti Broadband Ltd | 50.9K | 77.8K | 10 |
| AS41564GB | AS41564 Orion Network Limited | 50.9K | 7 | 200 |
| AS5631GB | ELEVATE Telcom Networks Limited | 50.2K | 655.4K | 32 |