ac ae aero af ag ai al am ar as at au az ba be bg bi biz bj bm br bv by bz ca cat cc cd cg ch ci ck cl cn com coop cx cy cz de dk dm do dz ec edu ee eg es eu fi fj fm fo fr gg gi gm gov gp gr gs gt hk hm hr hu id ie il im in info int io ir is it je jp kg ki kr kz la lb li lk lt lu lv ly ma mil mk mm mobi ms mt mu museum mw mx my na name net ng nl no nu nz org pe pk pl pm pro pt pw re ro ru rw sa se sg sh si sj sk sm sr st su tc tf tg th tj tk tl tm tn to tr tt tv tw ua ug uk us uy uz va ve vg vi vn vu wf ws yt yu za

ad arpa bt cm ga gb ge gf gl hn ht jo ke kh mc md mn nc nf pa ph pr sb sc so tp um vc

Note: JPNIC doesn't appear to publish lists of netblocks on their website - this data was derived by searching for "Japan Network Information Center" in the ARIN and APNIC databases. It may not be complete.