These entries are queried from radb.net using whois, you can try my project getting these.
:AS32897 route: 198.90.8.0/22 descr: Chelan County Public Utility District No.1 origin: AS32897 mnt-by: MAINT-AS16713 changed: mksmith [at] noanet.net 20041215 source: RADB last-modified: 2023-11-13T15:47:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.90.12.0/23 descr: Chelan County Public Utility District No.1 origin: AS32897 mnt-by: MAINT-AS16713 changed: mksmith [at] noanet.net 20041215 source: RADB last-modified: 2023-11-13T15:47:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source