These entries are queried from radb.net using whois, you can try my project getting these.
:AS3410 route: 144.62.0.0/17 origin: AS3410 descr: Computing Services 600 First Street West Mount Vernon IA 52314 United States admin-c: MC1602-ARIN tech-c: CORNE32-ARIN tech-c: MC1602-ARIN mnt-by: MNT-CORNEL-5 created: 2020-12-16T16:40:44Z last-modified: 2020-12-16T16:40:44Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source