These entries are queried from radb.net using whois, you can try my project getting these.
:AS33444 route: 208.77.224.0/21 descr: RR-RC-Tazewell County-Greensboro origin: AS33444 notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:00Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source