These entries are queried from radb.net using whois, you can try my project getting these.
:AS291 route: 198.124.0.0/14 descr: ESnet-CIDR-A Lawrence Berkeley Laboratory One Cyclotron Rd. CA 94720, USA origin: AS291 mnt-by: MAINT-ESNET changed: yhines [at] es.net 19960703 source: RADB last-modified: 2023-11-13T15:41:20Z rpki-ov-state: valid