These entries are queried from radb.net using whois, you can try my project getting these.
:AS399914 route: 192.58.137.0/24 origin: AS399914 descr: test admin-c: VHC15-ARIN tech-c: VHC15-ARIN mnt-by: MNT-CVHSP created: 2023-07-07T03:25:49Z last-modified: 2023-07-07T03:25:49Z source: ARIN rpki-ov-state: valid route6: 2606:7240::/32 origin: AS399914 descr: test admin-c: VHC15-ARIN tech-c: VHC15-ARIN mnt-by: MNT-CVHSP created: 2021-10-20T16:27:00Z last-modified: 2021-10-20T16:27:00Z source: ARIN rpki-ov-state: valid