These entries are queried from radb.net using whois, you can try my project getting these.
:AS393352 route: 198.135.47.0/24 descr: RR-RC-CITY OF LAREDO-Laredo origin: AS393352 mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:16Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source