These entries are queried from radb.net using whois, you can try my project getting these.
:AS53674 route: 64.39.228.0/24 descr: Tricorbraun/Kyvon origin: AS53674 mnt-by: MAINT-CHTR-WD changed: wendel.herron [at] chartercom.com 20110210 #21:29:31Z source: RADB last-modified: 2023-11-13T16:11:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.59.156.0/22 descr: Proxy entry for Kyvon - Central States KMA origin: AS53674 mnt-by: MAINT-CHTR-WD changed: john.abeln [at] chartercom.com 20110301 source: RADB last-modified: 2023-11-13T16:11:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 206.225.14.0/24 descr: Tricorbraun/Kyvon origin: AS53674 mnt-by: MAINT-CHTR-WD changed: wendel.herron [at] chartercom.com 20110210 #21:34:33Z source: RADB last-modified: 2023-11-13T16:11:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source