These entries are queried from radb.net using whois, you can try my project getting these.
:AS26477 route: 198.41.47.0/24 descr: proxy entry for Vantage Credit Union origin: AS26477 mnt-by: MAINT-CHTR-WD changed: nicholas.etnoyer [at] charter.com 20181105 #18:42:33Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source