These entries are queried from radb.net using whois, you can try my project getting these.
:AS397326 route: 23.142.48.0/24 descr: South Front Networks descr: 320 E Liberty St descr: Mankato, MN 56001 descr: US origin: AS397326 mnt-by: MNT-SFNL-1 changed: jayhanke [at] southfront.io 20190926 source: ARIN rpki-ov-state: valid route: 147.160.170.0/24 descr: South Front Networks descr: 320 E Liberty St descr: Mankato, MN 56001 descr: US origin: AS397326 mnt-by: MNT-SFNL-1 changed: jayhanke [at] southfront.io 20191003 source: ARIN rpki-ov-state: valid route6: 2620:13e:3000::/40 descr: South Front Networks descr: 320 E Liberty St descr: Mankato, MN 56001 descr: US origin: AS397326 mnt-by: MNT-SFNL-1 changed: hostmaster [at] example.net 20190806 source: ARIN rpki-ov-state: valid