These entries are queried from radb.net using whois, you can try my project getting these.
:AS395975 route: 142.147.51.0/24 descr: RR-RC-Texas_Department_of_Information_Resources-Denton_County origin: AS395975 mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source