These entries are queried from radb.net using whois, you can try my project getting these.
:AS11607 route: 137.216.0.0/16 origin: AS11607 descr: Morrill Hall 208 Box 2231 Brookings SD 57007 United States admin-c: CLS5-ARIN tech-c: CLS5-ARIN mnt-by: MNT-SDSU-Z created: 2021-11-29T21:05:13Z last-modified: 2021-11-29T21:05:13Z source: ARIN rpki-ov-state: valid route6: 2607:f558:1400::/40 descr: South Dakota State University origin: AS11607 mnt-by: MNT-SDSU changed: casey.sampson [at] sdstate.edu 20191211 source: ARIN rpki-ov-state: valid