These entries are queried from radb.net using whois, you can try my project getting these.
:AS36013 route: 208.53.220.0/24 origin: AS36013 descr: SDN on behalf of Missouri River Valley mnt-by: MAINT-AS13576 changed: chris.schuette [at] sdncommunications.com 20240424 # 1354Z source: RADB last-modified: 2024-04-24T13:54:16Z rpki-ov-state: valid route: 208.53.220.0/24 origin: AS36013 descr: Missouri River Energy Services 3724 W Avera Dr Sioux Falls SD 57108 United States admin-c: ADMIN3188-ARIN tech-c: ADMIN3188-ARIN mnt-by: MNT-MRES-6 created: 2022-01-03T22:22:36Z last-modified: 2022-01-04T21:54:21Z source: ARIN rpki-ov-state: valid