These entries are queried from radb.net using whois, you can try my project getting these.
:AS17939 route: 103.15.188.0/22 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 notify: minoru [at] miyazaki-catv.ne.jp notify: mcn044 [at] miyazaki-catv.ne.jp notify: mcn076 [at] miyazaki-catv.ne.jp notify: mcn094 [at] miyazaki-catv.ne.jp mnt-by: MAINT-AS17939 changed: mcn094 [at] miyazaki-catv.ne.jp 20240301 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.15.188.0/22 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 mnt-by: MAINT-AS17939 changed: mcn044 [at] miyazaki-catv.ne.jp 20130910 #09:02:27Z source: RADB last-modified: 2023-11-13T15:45:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 123.176.128.0/17 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 notify: minoru [at] miyazaki-catv.ne.jp notify: mcn044 [at] miyazaki-catv.ne.jp notify: mcn076 [at] miyazaki-catv.ne.jp notify: mcn094 [at] miyazaki-catv.ne.jp mnt-by: MAINT-AS17939 changed: mcn094 [at] miyazaki-catv.ne.jp 20240301 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 123.176.128.0/17 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 mnt-by: MAINT-AS17939 changed: mcn026 [at] miyazaki-catv.ne.jp 20090823 #02:23:58Z source: RADB last-modified: 2023-11-13T15:40:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 150.91.208.0/20 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 notify: minoru [at] miyazaki-catv.ne.jp notify: mcn044 [at] miyazaki-catv.ne.jp notify: mcn076 [at] miyazaki-catv.ne.jp notify: mcn094 [at] miyazaki-catv.ne.jp mnt-by: MAINT-AS17939 changed: mcn094 [at] miyazaki-catv.ne.jp 20240301 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 150.91.208.0/20 origin: AS17939 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN mnt-by: MAINT-AS17939 changed: minoru [at] miyazaki-catv.ne.jp 20210329 #01:47:22Z source: RADB last-modified: 2023-11-13T16:05:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.244.32.0/19 descr: miyazaki cabletelevision network Co.,LTD origin: AS17939 mnt-by: MAINT-AS2497 changed: noc [at] iij.ad.jp 20170919 source: RADB last-modified: 2023-11-13T15:51:34Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.244.32.0/19 descr: miyazaki cabletelevision network Co.,LTD origin: AS17939 mnt-by: MAINT-AS2497 changed: shuhei-o [at] iij.ad.jp 20231215 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 202.122.176.0/20 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 notify: minoru [at] miyazaki-catv.ne.jp notify: mcn044 [at] miyazaki-catv.ne.jp notify: mcn076 [at] miyazaki-catv.ne.jp notify: mcn094 [at] miyazaki-catv.ne.jp mnt-by: MAINT-AS17939 changed: mcn094 [at] miyazaki-catv.ne.jp 20240301 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 202.122.176.0/20 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 mnt-by: MAINT-AS17939 changed: mcn026 [at] miyazaki-catv.ne.jp 20050223 source: RADB last-modified: 2023-11-13T15:39:36Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 202.170.96.0/20 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 notify: minoru [at] miyazaki-catv.ne.jp notify: mcn044 [at] miyazaki-catv.ne.jp notify: mcn076 [at] miyazaki-catv.ne.jp notify: mcn094 [at] miyazaki-catv.ne.jp mnt-by: MAINT-AS17939 changed: mcn094 [at] miyazaki-catv.ne.jp 20240301 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 202.170.96.0/20 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 mnt-by: MAINT-AS17939 changed: mcn026 [at] miyazaki-catv.ne.jp 20040302 source: RADB last-modified: 2023-11-13T15:39:34Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.140.208.0/20 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 notify: minoru [at] miyazaki-catv.ne.jp notify: mcn044 [at] miyazaki-catv.ne.jp notify: mcn076 [at] miyazaki-catv.ne.jp notify: mcn094 [at] miyazaki-catv.ne.jp mnt-by: MAINT-AS17939 changed: mcn094 [at] miyazaki-catv.ne.jp 20240301 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.140.208.0/20 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 mnt-by: MAINT-AS17939 changed: mcn026 [at] miyazaki-catv.ne.jp 20030314 source: RADB last-modified: 2023-11-13T15:39:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 218.216.32.0/19 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 notify: minoru [at] miyazaki-catv.ne.jp notify: mcn044 [at] miyazaki-catv.ne.jp notify: mcn076 [at] miyazaki-catv.ne.jp notify: mcn094 [at] miyazaki-catv.ne.jp mnt-by: MAINT-AS17939 changed: mcn094 [at] miyazaki-catv.ne.jp 20240301 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 218.216.32.0/19 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 mnt-by: MAINT-AS17939 changed: mcn026 [at] miyazaki-catv.ne.jp 20020107 source: RADB last-modified: 2023-11-13T15:39:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 219.100.216.0/22 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 notify: minoru [at] miyazaki-catv.ne.jp notify: mcn044 [at] miyazaki-catv.ne.jp notify: mcn076 [at] miyazaki-catv.ne.jp notify: mcn094 [at] miyazaki-catv.ne.jp mnt-by: MAINT-AS17939 changed: mcn094 [at] miyazaki-catv.ne.jp 20240301 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 219.100.216.0/22 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 mnt-by: MAINT-AS17939 changed: minoru [at] miyazaki-catv.ne.jp 20160809 #06:39:06Z source: RADB last-modified: 2023-11-13T15:49:48Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 219.105.64.0/20 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 notify: minoru [at] miyazaki-catv.ne.jp notify: mcn044 [at] miyazaki-catv.ne.jp notify: mcn076 [at] miyazaki-catv.ne.jp notify: mcn094 [at] miyazaki-catv.ne.jp mnt-by: MAINT-AS17939 changed: mcn094 [at] miyazaki-catv.ne.jp 20240301 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 219.105.64.0/20 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 mnt-by: MAINT-AS17939 changed: mcn026 [at] miyazaki-catv.ne.jp 20020829 source: RADB last-modified: 2023-11-13T15:39:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2405:c700::/32 descr: MCN-NET01 miyazaki cabletelevision network Co.,LTD Head End room 2-119, Gion, Miyazaki-shi, Miyazaki-pref JAPAN origin: AS17939 notify: minoru [at] miyazaki-catv.ne.jp notify: mcn044 [at] miyazaki-catv.ne.jp notify: mcn076 [at] miyazaki-catv.ne.jp notify: mcn094 [at] miyazaki-catv.ne.jp mnt-by: MAINT-AS17939 changed: mcn094 [at] miyazaki-catv.ne.jp 20240301 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source