These entries are queried from radb.net using whois, you can try my project getting these.
:AS18135 route: 42.83.0.0/18 descr: BTV CO.,LTD. X-keiro : jpirr [at] btvm.co.jp origin: AS18135 notify: jpirr [at] btvm.co.jp mnt-by: MAINT-AS18135 changed: t-inoue [at] btvm.co.jp 20240118 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.0.0/19 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.0.0/19 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.16.0/20 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.16.0/20 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.32.0/20 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.32.0/20 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.32.0/21 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.32.0/21 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.40.0/21 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.40.0/21 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.48.0/20 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.48.0/20 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.48.0/21 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.48.0/21 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.56.0/22 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 42.83.56.0/22 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.205.48.0/22 descr: BTV CO.,LTD. X-keiro : jpirr [at] btvm.co.jp origin: AS18135 notify: jpirr [at] btvm.co.jp mnt-by: MAINT-AS18135 changed: t-inoue [at] btvm.co.jp 20240118 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 153.124.224.0/21 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240401 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 153.124.224.0/21 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20160916 source: RADB last-modified: 2023-11-13T15:49:52Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 163.131.104.0/22 descr: IIJ Customer route origin: AS18135 mnt-by: MAINT-AS2497 changed: noc [at] iij.ad.jp 20171212 source: RADB last-modified: 2023-11-13T15:52:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 163.131.104.0/22 descr: IIJ Customer route origin: AS18135 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: 163.131.108.0/22 descr: IIJ Customer route origin: AS18135 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: 163.131.108.0/22 descr: IIJ Customer route origin: AS18135 mnt-by: MAINT-AS2497 changed: noc [at] iij.ad.jp 20171212 source: RADB last-modified: 2023-11-13T15:52:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 182.23.216.0/21 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 182.23.216.0/21 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.32.0/20 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.32.0/20 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.40.0/21 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.40.0/21 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.43.0/24 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.43.0/24 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.44.0/24 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.44.0/24 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.45.0/24 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.45.0/24 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.46.0/24 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.46.0/24 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.47.0/24 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.47.0/24 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.48.0/21 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.48.0/21 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.48.0/23 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.48.0/23 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.50.0/23 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.50.0/23 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.52.0/23 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.52.0/23 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.54.0/23 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 203.211.54.0/23 descr: BTV Cable Television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 219.100.88.0/22 descr: BTV CO.,LTD. X-keiro : jpirr [at] btvm.co.jp origin: AS18135 notify: jpirr [at] btvm.co.jp mnt-by: MAINT-AS18135 changed: t-inoue [at] btvm.co.jp 20240118 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 219.103.0.0/19 descr: BTV Cable television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20150810 source: RADB last-modified: 2023-11-13T15:48:05Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 219.103.0.0/19 descr: BTV Cable television origin: AS18135 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20240101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 219.103.0.0/24 descr: BTV Cable television origin: AS18135 notify: noc [at] noc.kddnet.ad.jp mnt-by: MAINT-AS2516 changed: noc [at] noc.kddnet.ad.jp 20020711 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: 219.103.1.0/24 descr: BTV Cable television origin: AS18135 notify: noc [at] noc.kddnet.ad.jp mnt-by: MAINT-AS2516 changed: noc [at] noc.kddnet.ad.jp 20020711 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: 219.103.2.0/23 descr: BTV Cable television origin: AS18135 notify: noc [at] noc.kddnet.ad.jp mnt-by: MAINT-AS2516 changed: noc [at] noc.kddnet.ad.jp 20020711 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: 219.103.4.0/22 descr: BTV Cable television origin: AS18135 notify: noc [at] noc.kddnet.ad.jp mnt-by: MAINT-AS2516 changed: noc [at] noc.kddnet.ad.jp 20020711 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: 219.103.8.0/21 descr: BTV Cable television origin: AS18135 notify: noc [at] noc.kddnet.ad.jp mnt-by: MAINT-AS2516 changed: noc [at] noc.kddnet.ad.jp 20020711 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: 219.103.16.0/20 descr: BTV Cable television origin: AS18135 notify: noc [at] noc.kddnet.ad.jp mnt-by: MAINT-AS2516 changed: noc [at] noc.kddnet.ad.jp 20020711 source: RADB last-modified: 2023-11-13T15:39:32Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2401:d500::/32 descr: BTV CO.,LTD. X-keiro : jpirr [at] btvm.co.jp origin: AS18135 notify: jpirr [at] btvm.co.jp mnt-by: MAINT-AS18135 changed: t-inoue [at] btvm.co.jp 20240118 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source