These entries are queried from radb.net using whois, you can try my project getting these.
:AS397945 route: 23.141.176.0/24 descr: MTG-37-V4-01 assigned by ARIN origin: AS397945 notify: noc [at] madrone.tech mnt-by: MNT-MTG-37 changed: alex [at] madrone.tech 20191212 source: ARIN rpki-ov-state: valid route6: 2001:470:235::/48 origin: AS397945 descr: NET-2001-470-235---48-AS397945 admin-c: ZH17-ARIN tech-c: ZH17-ARIN mnt-by: MNT-HURC source: ARIN created: 2023-12-02T02:45:25Z last-modified: 2023-12-02T02:45:25Z rpki-ov-state: valid route6: 2602:fdb3::/36 descr: MTG-V6-1 assigned by ARIN origin: AS397945 notify: noc [at] madrone.tech mnt-by: MNT-MTG-37 changed: alex [at] madrone.tech 20191212 source: ARIN rpki-ov-state: valid