These entries are queried from radb.net using whois, you can try my project getting these.
:AS17234 route: 138.236.0.0/16 descr: Gustavus Adolphus College origin: AS17234 notify: farmer [at] umn.edu notify: doachs [at] gac.edu mnt-by: MAINT-AS217 changed: farmer [at] umn.edu 20180329 #21:29:39Z source: RADB last-modified: 2023-11-13T15:53:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2606:8fc0::/32 origin: AS17234 descr: Gustavus Adolphus College notify: farmer [at] umn.edu notify: doachs [at] gac.edu mnt-by: MAINT-AS217 changed: farmer [at] umn.edu 20211204 #06:31:53Z source: RADB last-modified: 2023-11-13T16:09:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:46:8000::/48 descr: Gustavus Adolphus College origin: AS17234 notify: farmer [at] umn.edu notify: doachs [at] gac.edu mnt-by: MAINT-AS217 changed: farmer [at] umn.edu 20180329 #21:32:04Z source: RADB last-modified: 2023-11-13T15:53:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source