These entries are queried from radb.net using whois, you can try my project getting these.
:AS54068 route: 204.77.145.0/24 descr: Proxy entry for City of Greeneville, SC origin: AS54068 mnt-by: MAINT-CHTR-WD changed: john.abeln [at] chartercom.com 20110926 #19:25:20Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source