These entries are queried from radb.net using whois, you can try my project getting these.
:AS131894 route: 223.223.166.0/24 descr: UNIADEX, LTD. origin: AS131894 notify: ucloud-nic [at] ml.uniadex.co.jp mnt-by: MAINT-AS38643 changed: ucloud-nic [at] ml.uniadex.co.jp 20130125 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 223.223.166.0/24 descr: UNIADEX, LTD. X-Keiro : ucloud-nic [at] ml.uniadex.co.jp origin: AS131894 notify: ucloud-nic [at] ml.uniadex.co.jp mnt-by: MAINT-AS38643 changed: ucloud-nic [at] ml.uniadex.co.jp 20231017 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source