These entries are queried from radb.net using whois, you can try my project getting these.
:AS23833 route: 202.61.1.0/24 descr: Marusan-Sec BackBone origin: AS23833 notify: otani [at] marusan-sec.co.jp mnt-by: MAINT-AS23833 changed: otani [at] marusan-sec.co.jp 20070713 #08:30:03(UTC) source: RADB last-modified: 2023-12-03T22:00:06Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source