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 8,570,432 233 1 734
Jupiter Telecommunication Co. Ltd 4,745,216 232 1 183
Internet Initiative Japan Inc. 3,790,336 1.56 x 233 1 193
4 Amazon.com, Inc. 1,227,520 1.13 x 232 1 156
5 Pacnet Services (Japan) Corp. 363,448 1.5 x 233 4 5,711
6 NHN Techorus Corp. 127,232 232 2 150
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 107,520 0 1 48
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 CLARA ONLINE, Inc. 24,576 232 1 12
16 GATEWAY INC 24,576 0 1 45
17 Ace, Inc. 24,576 0 1 3
18 Ishikawa Computer Center Co.,LTD. 23,552 232 1 13
19 mediatti broadband communications 20,992 0 1 13
20 UUNET Japan Limited 20,768 225 1 33