These entries are queried from radb.net using whois, you can try my project getting these.
:AS33435 route: 66.37.46.0/24 descr: City of Springfield, MA origin: AS33435 mnt-by: MAINT-AS27506 changed: yasu.ikehara [at] crowncastle.com 20210330 source: RADB last-modified: 2023-11-13T16:05:27Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source