These entries are queried from radb.net using whois, you can try my project getting these.
:AS19153 route: 208.87.72.0/22 descr: The University of Tennessee at Martin descr: 102 Crisp Hall descr: Martin TN 38238 descr: US origin: AS19153 mnt-by: MNT-UTAM changed: markm [at] utm.edu 20190408 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.87.72.0/22 descr: The University of Tennessee at Martin origin: AS19153 mnt-by: MAINT-CHTR-WD changed: john.abeln [at] chartercom.com 20091028 source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source