| 順位 | AS 番号 | 組織名 | IPv4 アドレス数 |
|---|---|---|---|
| 1 | AS2856 | BT-UK-AS British Telecommunications Limited | 13,850,112 |
| 2 | AS5089 | NTL Virgin Media Limited | 8,490,485 |
| 3 | AS786 | JANET Jisc Services Limited | 6,885,120 |
| 4 | AS5607 | BSKYB-BROADBAND-AS Sky UK Limited | 6,089,727 |
| 5 | AS13285 | OPALTELECOM-AS TalkTalk Communications Limited | 3,954,943 |
| 6 | AS5378 | Vodafone Limited | 2,531,327 |
| 7 | AS6871 | Plusnet British Telecommunications Limited | 2,097,664 |
| 8 | AS8220 | COLT COLT Technology Services Group Limited | 1,489,152 |
| 9 | AS212238 | CDNEXT Datacamp Limited | 1,083,904 |
| 10 | AS8426 | CLARANET-AS Claranet Limited | 904,704 |
| 11 | AS5413 | Wavenet-AS5413 Wavenet Limited | 732,160 |
| 12 | AS5400 | BT British Telecommunications Limited | 713,472 |
| 13 | AS31655 | ASN-GammaTelecom Gamma Telecom Holdings Ltd | 609,536 |
| 14 | AS206067 | H3GUK Hutchison 3G UK Limited | 529,152 |
| 15 | AS13037 | ZEN-AS Zen Internet Ltd | 527,616 |
| 16 | AS3300 | BT British Telecommunications Limited | 512,768 |
| 17 | AS42689 | Glide Glide Student & Residential Limited | 492,800 |
| 18 | AS8851 | EDGE GCI Network Solutions Limited | 459,008 |
| 19 | AS15395 | RACKSPACE-LON Rackspace Ltd. | 402,176 |
| 20 | AS20860 | IOMART-AS IOMART CLOUD SERVICES LIMITED | 379,136 |
| 21 | AS8468 | ENTANET Cityfibre Limited | 358,400 |
| 22 | AS62240 | Clouvider Clouvider Limited | 352,256 |
| 23 | AS25180 | EXPONENTIAL-E-AS Exponential-E Ltd. | 291,328 |
| 24 | AS30844 | LIQUID-AS Liquid Telecommunications Ltd | 279,808 |
| 25 | AS12390 | KINGSTON-UK-AS KCOM Group Limited | 249,856 |
| 26 | AS25310 | ASN-CWACCESS Vodafone Limited | 229,376 |
| 27 | AS201838 | ASN-COMMUNITYFIBRE Community Fibre Limited | 221,952 |
| 28 | AS8607 | TIMICO Digital Space Group Limited | 205,568 |
| 29 | AS35228 | O2BROADBAND Telefonica UK Limited | 201,728 |
| 30 | AS12703 | PULSANT-AS Pulsant (Scotland) Ltd | 179,712 |
| 31 | AS47474 | Virtual1 Virtual1 Limited | 153,344 |
| 32 | AS20712 | AS20712 Andrews & Arnold Ltd | 148,723 |
| 33 | AS15404 | COLT Technology Services Group Limited | 141,568 |
| 34 | AS56478 | BCUBE-AS Hyperoptic Ltd | 141,312 |
| 35 | AS198864 | QMW-AC-UK Queen Mary University of London | 132,864 |
| 36 | AS8698 | NATIONWIDE BUILDING SOCIETY | 131,072 |
| 37 | AS15914 | British Airways plc | 131,072 |
| 38 | AS25369 | BANDWIDTH-AS Hydra Communications Ltd | 130,304 |
| 39 | AS60068 | CDN77 Datacamp Limited | 129,792 |
| 40 | AS5587 | ITILITY-LIMITED Itility Limited | 121,856 |
| 41 | AS41354 | its-tg ITS Technology Group Limited | 117,248 |
| 42 | AS42831 | UKSERVERS-AS UK Dedicated Servers Limited | 112,128 |
| 43 | AS8586 | OBSL-AS TalkTalk Communications Limited | 108,032 |
| 44 | AS56329 | GIGACLEAR Gigaclear Limited | 106,496 |
| 45 | AS3223 | VOXILITY Voxility LLP | 105,472 |
| 46 | AS6908 | DATAHOP Six Degrees Technology Group Limited | 104,448 |
| 47 | AS39326 | HSO-GROUP Syntura Group Limited | 103,936 |
| 48 | AS58065 | PacketExchange Orion Network Limited | 101,120 |
| 49 | AS13213 | UK2NET-AS THG HOSTING LIMITED | 99,840 |
| 50 | AS5503 | RMIFL RM Education Ltd | 99,328 |
| 51 | AS48101 | TROOLI-AS Trooli Ltd. | 99,072 |
| 52 | AS214143 | skydigital-telecom SKYDIGITAL TELECOM LTD | 98,560 |
| 53 | AS25160 | VORBOSS Vorboss Limited | 97,024 |
| 54 | AS42973 | METRONETUK_M24SEVEN Convergence Group (Wireless) Networks Limited | 91,136 |
This product includes GeoLite2 data created by MaxMind, available from https://www.maxmind.com.