These entries are queried from radb.net using whois, you can try my project getting these.
:AS16520 route: 199.27.152.0/22 descr: Proxy for South carolina federal Credit Union origin: AS16520 mnt-by: MAINT-AS2711 changed: kevin.billings [at] spirittelecom.com 20100907 #20:58:04Z source: RADB last-modified: 2023-11-13T15:41:00Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source