These entries are queried from radb.net using whois, you can try my project getting these.
:AS399503 route: 23.173.56.0/24 origin: AS399503 descr: REDiTECH 4509 S. 143rd St Suite 2 Omaha NE 68137 United States admin-c: JDJ13-ARIN tech-c: JDJ13-ARIN mnt-by: MNT-PSL-290 created: 2024-04-21T16:34:09Z last-modified: 2024-04-21T16:34:09Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 38.22.218.0/23 origin: AS399503 descr: Route Registered for Cogent Communications Customer - Americom Networks LLC geoidx: US mnt-by: MAINT-AS174 changed: neteng [at] cogentco.com source: RADB last-modified: 2024-04-19T13:17:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 38.22.218.0/24 origin: AS399503 descr: Route Registered for Cogent Communications Customer - Americom Networks LLC geoidx: US mnt-by: MAINT-AS174 changed: neteng [at] cogentco.com source: RADB last-modified: 2024-04-19T13:17:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 38.22.219.0/24 origin: AS399503 descr: Route Registered for Cogent Communications Customer - Americom Networks LLC geoidx: US mnt-by: MAINT-AS174 changed: neteng [at] cogentco.com source: RADB last-modified: 2024-04-19T13:17:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 38.121.118.0/24 origin: AS399503 descr: Route Object for Cogent Communications Customer - Dice Carrier Services LLC geoidx: US mnt-by: MAINT-AS174 changed: neteng [at] cogentco.com 20210406 #13:22:24Z source: RADB last-modified: 2023-11-13T16:05:28Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 38.121.119.0/24 origin: AS399503 descr: Route Object for Cogent Communications Customer - Dice Carrier Services LLC geoidx: US mnt-by: MAINT-AS174 changed: neteng [at] cogentco.com 20210406 #13:22:55Z source: RADB last-modified: 2023-11-13T16:05:28Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 38.121.123.0/24 origin: AS399503 descr: Route Registered for Cogent Communications Customer - Americom Networks LLC geoidx: US mnt-by: MAINT-AS174 changed: neteng [at] cogentco.com source: RADB last-modified: 2024-04-19T13:17:09Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2602:f954::/36 origin: AS399503 descr: REDiTECH 4509 S. 143rd St Suite 2 Omaha NE 68137 United States admin-c: JDJ13-ARIN tech-c: JDJ13-ARIN mnt-by: MNT-PSL-290 created: 2024-04-21T17:49:30Z last-modified: 2024-04-21T17:49:30Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source