These entries are queried from radb.net using whois, you can try my project getting these.
:AS61841 route: 192.100.251.0/24 origin: AS61841 descr: CUSTOM_LINKFULL mnt-by: MAINT-AS263047 changed: juliard [at] linkfull.com.br 20211126 #17:23:08Z source: RADB last-modified: 2023-11-13T16:08:56Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2801:80:b80::/48 origin: AS61841 descr: CUSTOM-FLIX mnt-by: MAINT-AS263047 changed: juliard [at] linkfull.com.br 20200803 #13:21:01Z source: RADB last-modified: 2023-11-13T16:01:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source