These entries are queried from radb.net using whois, you can try my project getting these.
:AS22496 route: 74.120.48.0/22 descr: Avanti Network Group, Inc origin: AS22496 mnt-by: MAINT-AS27506 changed: jmcnallie [at] lightower.com 20170329 source: RADB last-modified: 2023-11-13T15:50:56Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source