These entries are queried from radb.net using whois, you can try my project getting these.
:AS1252 route: 137.197.0.0/16 origin: AS1252 descr: University of Nebraska #UNIVER-248 admin-c: ADMIN6486-ARIN tech-c: TECH1045-ARIN notify: network [at] nebraska.edu mnt-by: MAINT-AS7896 changed: walter.aude [at] nebraska.edu 20191030 #21:41:45Z source: RADB last-modified: 2023-11-13T15:58:35Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.94.102.0/24 origin: AS1252 descr: University of Nebraska #UNIVER-248 admin-c: ADMIN6486-ARIN tech-c: TECH1045-ARIN notify: network [at] nebraska.edu mnt-by: MAINT-AS7896 changed: walter.aude [at] nebraska.edu 20200622 #17:09:22Z source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.94.103.0/24 origin: AS1252 descr: University of Nebraska #UNIVER-248 admin-c: ADMIN6486-ARIN tech-c: TECH1045-ARIN notify: network [at] nebraska.edu mnt-by: MAINT-AS7896 changed: walter.aude [at] nebraska.edu 20200622 #17:10:15Z source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.94.104.0/24 origin: AS1252 descr: University of Nebraska #UNIVER-248 admin-c: ADMIN6486-ARIN tech-c: TECH1045-ARIN notify: network [at] nebraska.edu mnt-by: MAINT-AS7896 changed: walter.aude [at] nebraska.edu 20200622 #17:11:15Z source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.94.105.0/24 origin: AS1252 descr: University of Nebraska #UNIVER-248 admin-c: ADMIN6486-ARIN tech-c: TECH1045-ARIN notify: network [at] nebraska.edu mnt-by: MAINT-AS7896 changed: walter.aude [at] nebraska.edu 20200622 #17:12:18Z source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.94.106.0/24 origin: AS1252 descr: University of Nebraska #UNIVER-248 admin-c: ADMIN6486-ARIN tech-c: TECH1045-ARIN notify: network [at] nebraska.edu mnt-by: MAINT-AS7896 changed: walter.aude [at] nebraska.edu 20200622 #17:13:24Z source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.94.107.0/24 origin: AS1252 descr: University of Nebraska #UNIVER-248 admin-c: ADMIN6486-ARIN tech-c: TECH1045-ARIN notify: network [at] nebraska.edu mnt-by: MAINT-AS7896 changed: walter.aude [at] nebraska.edu 20200622 #17:14:13Z source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.94.108.0/24 origin: AS1252 descr: University of Nebraska #UNIVER-248 admin-c: ADMIN6486-ARIN tech-c: TECH1045-ARIN notify: network [at] nebraska.edu mnt-by: MAINT-AS7896 changed: walter.aude [at] nebraska.edu 20200622 #17:15:08Z source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.198.32.0/20 origin: AS1252 descr: University of Nebraska #UNIVER-248 admin-c: ADMIN6486-ARIN tech-c: TECH1045-ARIN notify: network [at] nebraska.edu mnt-by: MAINT-AS7896 changed: walter.aude [at] nebraska.edu 20200622 #17:16:06Z source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.198.48.0/21 origin: AS1252 descr: University of Nebraska #UNIVER-248 admin-c: ADMIN6486-ARIN tech-c: TECH1045-ARIN notify: network [at] nebraska.edu mnt-by: MAINT-AS7896 changed: walter.aude [at] nebraska.edu 20200622 #17:16:49Z source: RADB last-modified: 2023-11-13T16:01:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source