These entries are queried from radb.net using whois, you can try my project getting these.
:AS26488 route: 129.210.0.0/16 descr: SCU-ASN Santa Clara University Information Technology Santa Clara, CA 95053 USA origin: AS26488 mnt-by: MAINT-AS26488 changed: tschmitzer [at] scu.edu 20021209 source: RADB last-modified: 2023-11-13T15:42:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 129.210.0.0/21 descr: SCU-ASN Santa Clara University Information Technology Santa Clara, CA 95053 USA origin: AS26488 mnt-by: MAINT-AS26488 changed: tschmitzer [at] scu.edu 20030416 source: RADB last-modified: 2023-11-13T15:42:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source