These entries are queried from radb.net using whois, you can try my project getting these.
:AS22851 route: 198.180.229.0/24 origin: AS22851 descr: NET Services 1200 South Jay Street Aberdeen SD 57401-7198 United States admin-c: JCA471-ARIN tech-c: IVERS61-ARIN tech-c: JCA471-ARIN mnt-by: MNT-NSU-Z created: 2022-01-26T15:24:24Z last-modified: 2022-01-26T15:24:24Z source: ARIN rpki-ov-state: valid route: 206.176.20.0/24 descr: State of South Dakota - RIS descr: 700 Governor's Drive descr: Pierre, SD 57501 descr: US origin: AS22851 mnt-by: MNT-SDSG changed: jeff.litterick [at] state.sd.us 20210924 source: ARIN rpki-ov-state: valid route: 206.176.21.0/24 descr: State of South Dakota - RIS descr: 700 Governor's Drive descr: Pierre, SD 57501 descr: US origin: AS22851 mnt-by: MNT-SDSG changed: jeff.litterick [at] state.sd.us 20210924 source: ARIN rpki-ov-state: valid route: 206.176.54.0/24 descr: State of South Dakota - RIS descr: 700 Governor's Drive descr: Pierre, SD 57501 descr: US origin: AS22851 mnt-by: MNT-SDSG changed: jeff.litterick [at] state.sd.us 20210924 source: ARIN rpki-ov-state: valid route6: 2607:f558:c00::/40 descr: Northern State University descr: 1200 S Jay Street descr: Aberdeen, SD 57401 origin: AS22851 mnt-by: MNT-NSU changed: Jodi.casanova [at] northern.edu 20200102 source: ARIN rpki-ov-state: valid