These entries are queried from radb.net using whois, you can try my project getting these.
:AS62920 route: 198.133.143.0/24 origin: AS62920 descr: Prairie Power, Inc. IRR Object admin-c: SMITH910-ARIN tech-c: SMITH910-ARIN mnt-by: MNT-PP-198 created: 2021-07-22T14:45:28Z last-modified: 2021-07-22T14:45:28Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source