These entries are queried from radb.net using whois, you can try my project getting these.
:AS57 route: 64.62.149.0/24 origin: AS57 mnt-by: MNT-UNIVER-233 descr: Guest Network (WiFi) University of Minnesota Office of Information Technology 2218 Univ Ave SE Minneapolis MN 55414 United States tech-c: NTA-ORG-ARIN admin-c: NTA-ORG-ARIN source: ARIN created: 2020-06-15T17:46:31Z last-modified: 2020-06-15T17:46:31Z rpki-ov-state: valid route: 64.62.149.0/24 descr: UMN Guest Wireless Office of Information Technology University of Minnesota Information Technology Building 2218 University Ave SE origin: AS57 admin-c: NTA-ORG-ARIN tech-c: NTA-ORG-ARIN mnt-by: MAINT-AS217 changed: farmer [at] umn.edu 20161202 #07:05:56Z source: RADB last-modified: 2023-11-13T15:50:10Z rpki-ov-state: valid route: 146.57.248.0/21 origin: AS57 mnt-by: MNT-UNIVER-233-Z descr: Northern Lights GigaPoP University of Minnesota Office of Information Technology 2218 Univ Ave SE Minneapolis MN 55414 United States tech-c: NTA-ORG-ARIN admin-c: NTA-ORG-ARIN source: ARIN created: 2020-06-15T17:38:23Z last-modified: 2020-06-15T17:38:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 146.57.248.0/21 descr: Northern Lights GigaPOP Office of Information Technology University of Minnesota Information Technology Building 2218 University Ave SE Minneapolis, MN 55414 origin: AS57 admin-c: NTA-ORG-ARIN tech-c: NTA-ORG-ARIN remarks: Operated by: University of Minnesota notify: farmer [at] umn.edu mnt-by: MAINT-AS217 changed: farmer [at] umn.edu 20141216 #22:27:00Z source: RADB last-modified: 2023-11-13T15:47:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.35.86.0/24 origin: AS57 mnt-by: MNT-UNIVER-233-Z descr: Northern Lights GigaPoP University of Minnesota Office of Information Technology 2218 Univ Ave SE Minneapolis MN 55414 United States tech-c: NTA-ORG-ARIN admin-c: NTA-ORG-ARIN source: ARIN created: 2020-06-15T17:41:21Z last-modified: 2020-06-15T17:41:21Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.35.86.0/24 descr: MIXNET-NET Office of Information Technology University of Minnesota Information Technology Building 2218 University Ave SE Minneapolis, MN 55414 origin: AS57 admin-c: NTA-ORG-ARIN tech-c: NTA-ORG-ARIN notify: farmer [at] umn.edu mnt-by: MAINT-AS217 changed: farmer [at] umn.edu 20141216 #22:26:01Z source: RADB last-modified: 2023-11-13T15:47:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.42.152.0/24 descr: Office of Information Technology University of Minnesota Information Technology Building 2218 University Ave SE Minneapolis, MN 55414 origin: AS57 admin-c: NTA-ORG-ARIN tech-c: NTA-ORG-ARIN mnt-by: MAINT-AS217 changed: farmer [at] umn.edu 20171213 #17:07:28Z source: RADB last-modified: 2023-11-13T15:52:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.42.152.0/24 origin: AS57 mnt-by: MNT-UNIVER-233-Z descr: Northern Lights GigaPoP University of Minnesota Office of Information Technology 2218 Univ Ave SE Minneapolis MN 55414 United States tech-c: NTA-ORG-ARIN admin-c: NTA-ORG-ARIN source: ARIN created: 2020-06-15T17:43:40Z last-modified: 2020-06-15T17:43:40Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:468:1900::/40 origin: AS57 mnt-by: MNT-UNIVER-233 descr: Northern Lights GigaPoP University of Minnesota Office of Information Technology 2218 Univ Ave SE Minneapolis MN 55414 United States tech-c: NTA-ORG-ARIN admin-c: NTA-ORG-ARIN source: ARIN created: 2020-06-15T17:55:26Z last-modified: 2020-06-15T17:55:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:468:1900::/40 descr: UofMinnesota DBA Northern Lights GigaPOP University of Minnesota 2218 University Ave SE Minneapolis MN, 55414, USA origin: AS57 mnt-by: MAINT-AS217 changed: farmer [at] umn.edu 20110516 #23:12:14Z source: RADB last-modified: 2023-11-13T15:41:18Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:470:22::/48 origin: AS57 descr: NET-2001-470-22---48-AS57 admin-c: ZH17-ARIN tech-c: ZH17-ARIN mnt-by: MNT-HURC source: ARIN created: 2022-01-20T20:20:44Z last-modified: 2022-01-20T20:20:44Z rpki-ov-state: valid route6: 2607:ea00::/32 origin: AS57 mnt-by: MNT-UNIVER-233 descr: Northern Lights GigaPoP University of Minnesota Office of Information Technology 2218 Univ Ave SE Minneapolis MN 55414 United States tech-c: NTA-ORG-ARIN admin-c: NTA-ORG-ARIN source: ARIN created: 2020-06-15T17:50:38Z last-modified: 2020-06-15T17:50:38Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2607:ea00::/32 descr: UofMinnesota DBA Northern Lights GigaPOP University of Minnesota 2218 University Ave SE Minneapolis MN, 55414, USA origin: AS57 mnt-by: MAINT-AS217 changed: farmer [at] umn.edu 20110516 #23:10:49Z source: RADB last-modified: 2023-11-13T15:41:18Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source