These entries are queried from radb.net using whois, you can try my project getting these.
:AS63307 route: 66.152.203.0/24 descr: Cooley Dickinson Hosp origin: AS63307 mnt-by: MAINT-AS27506 changed: probillard [at] lightower.com 20150416 source: RADB last-modified: 2023-11-13T15:47:24Z rpki-ov-state: valid