These entries are queried from radb.net using whois, you can try my project getting these.
:AS64227 route: 50.20.196.0/22 origin: AS64227 descr: PO Box 230 Aitkin MN 56431 United States admin-c: CLUFF-ARIN tech-c: CLUFF-ARIN tech-c: NRB2-ARIN tech-c: PTS7-ARIN tech-c: RASMU92-ARIN mnt-by: MNT-MLEC-1 created: 2023-09-18T16:24:40Z last-modified: 2024-03-05T14:23:07Z source: ARIN rpki-ov-state: valid route: 64.237.104.0/22 origin: AS64227 descr: PO Box 230 Aitkin MN 56431 United States admin-c: CLUFF-ARIN tech-c: CLUFF-ARIN tech-c: NRB2-ARIN tech-c: PTS7-ARIN tech-c: RASMU92-ARIN mnt-by: MNT-MLEC-1 created: 2024-03-05T14:20:32Z last-modified: 2024-03-05T14:23:07Z source: ARIN rpki-ov-state: valid route: 64.237.104.0/22 descr: Proxy registration to prevent harm from ARIN-NONAUTH shutdown origin: AS64227 mnt-by: MAINT-AS7034 changed: kennethfinnegan2007 [at] gmail.com 20220404 source: ALTDB rpki-ov-state: valid route: 142.202.52.0/22 origin: AS64227 descr: Northern Network Concepts, Inc. 58 E Broadway Little Falls MN 56345 United States admin-c: GANGE1-ARIN tech-c: GANGE1-ARIN mnt-by: MNT-NNC-40 created: 2022-03-30T22:01:31Z last-modified: 2022-03-30T22:01:31Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 148.64.62.0/23 origin: AS64227 descr: PO Box 230 Aitkin MN 56431 United States admin-c: CLUFF-ARIN tech-c: CLUFF-ARIN tech-c: NRB2-ARIN tech-c: PTS7-ARIN tech-c: RASMU92-ARIN mnt-by: MNT-MLEC-1 created: 2024-03-05T14:21:03Z last-modified: 2024-03-05T14:23:07Z source: ARIN rpki-ov-state: valid route: 148.64.62.0/23 descr: Proxy registration to prevent harm from ARIN-NONAUTH shutdown origin: AS64227 mnt-by: MAINT-AS7034 changed: kennethfinnegan2007 [at] gmail.com 20220404 source: ALTDB rpki-ov-state: valid route: 192.234.192.0/23 origin: AS64227 descr: Northern Network Concepts, Inc. 58 E Broadway Little Falls MN 56345 United States admin-c: GANGE1-ARIN tech-c: GANGE1-ARIN mnt-by: MNT-NNC-40 created: 2022-03-30T22:00:22Z last-modified: 2022-03-30T22:00:22Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2606:4f40::/32 origin: AS64227 descr: Northern Network Concepts, Inc. 58 E Broadway Little Falls MN 56345 United States admin-c: GANGE1-ARIN tech-c: GANGE1-ARIN mnt-by: MNT-NNC-40 created: 2021-06-22T21:11:31Z last-modified: 2021-06-22T21:11:31Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2606:df80::/32 descr: CTC Transit IPv6 origin: AS64227 notify: network [at] 7sigma.net mnt-by: MNT-COTC changed: psampson [at] 7sigma.com 20170303 source: ARIN rpki-ov-state: valid