These entries are queried from radb.net using whois, you can try my project getting these.
:AS46676 route: 12.133.6.0/24 descr: SEMO Hospital/Charter Bussiness Customer origin: AS46676 mnt-by: MAINT-CHTR-WD changed: kevin.brunner [at] chartercom.com 20110715 #20:37:01Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source