These entries are queried from radb.net using whois, you can try my project getting these.
:AS36037 route: 69.147.0.0/18 descr: RR-RC-Education Service Center Region 20-SanAntonio origin: AS36037 notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:14:59Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source