These entries are queried from radb.net using whois, you can try my project getting these.
:AS36701 route: 147.253.0.0/16 descr: RR-RC-Stetson University-Tampa Bay origin: AS36701 mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 147.253.192.0/20 descr: RR-RC-Stetson University-Florida origin: AS36701 admin-c: IPADDREG tech-c: IPADDREG notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20210204 #05:44:47Z source: RADB last-modified: 2023-11-13T16:15:18Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source