These entries are queried from radb.net using whois, you can try my project getting these.
:AS397287 route: 72.21.23.0/24 origin: AS397287 descr: RR-RC-AUTO CRIB-Pacwest mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20190403 #15:32:53Z source: RADB last-modified: 2023-11-13T16:15:18Z rpki-ov-state: valid