These entries are queried from radb.net using whois, you can try my project getting these.
:AS63038 route: 198.147.202.0/24 descr: Delaware Division of Libraries origin: AS63038 mnt-by: MAINT-AS27506 changed: dmccoon [at] lightower.com 20190325 source: RADB last-modified: 2023-11-13T15:55:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source