These entries are queried from radb.net using whois, you can try my project getting these.
:AS16408 route: 206.117.32.0/24 descr: Charles R Drew University of Medicine and Science origin: AS16408 notify: yadong [at] usc.edu notify: ypyun [at] usc.edu notify: SandyG [at] usc.edu remarks: Proxy-registered route object mnt-by: MAINT-AS226 changed: yadong [at] usc.edu 20170815 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 206.117.32.0/24 descr: RR-RC-Charles R Drew University of Medicine and Science-Los Angeles origin: AS16408 notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:18Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source