These entries are queried from radb.net using whois, you can try my project getting these.
:AS40674 route: 192.33.136.0/24 descr: DELAWARE COUNTY INTERMEDIATE UNIT origin: AS40674 mnt-by: MAINT-AS27506 changed: rhinst [at] lightower.com 20140616 source: RADB last-modified: 2023-11-13T15:46:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source