Internet Service Providers in Japan

Top 20 organizations with the largest IP allocations in Japan

Japan

Top 20 organizations with the largest IP allocations


Rank Name IPv4 addresses IPv6 /64 networks AS numbers Prefixes
Research Organization of Information and Systems, National Institute of Informa 8,640,960 233 1 750
Jupiter Telecommunication Co. Ltd 4,745,216 232 1 183
Amazon.com, Inc. 3,819,008 1.06 x 232 1 195
4 Internet Initiative Japan Inc. 3,792,128 1.03 x 234 1 204
5 Pacnet Services (Japan) Corp. 149,912 1.5 x 233 3 257
6 NHN Techorus Corp. 129,024 232 2 160
7 Yahoo Japan 119,808 232 1 6
8 Information Systems Department, Japan Aerospace Exploration Agency 115,200 0 1 17
9 Yahoo Japan Corporation 108,544 0 1 49
10 MITSUI KNOWLEDGE INDUSTRY CO., LTD. 71,680 232 1 4
11 Wakayama University 65,536 0 1 1
12 National Institute for Fusion Science 65,536 0 1 1
13 Rakuten Communications K.K. 60,160 232 2 14
14 Osaki Computer Engineering Co.Ltd 35,328 232 1 7
15 GATEWAY INC 25,344 0 1 47
16 CLARA ONLINE, Inc. 24,576 0 1 11
17 mediatti broadband communications 24,576 0 1 13
18 Ace, Inc. 24,576 0 1 3
19 Ishikawa Computer Center Co.,LTD. 23,552 232 1 13
20 UUNET Japan Limited 20,512 225 1 32