These entries are queried from radb.net using whois, you can try my project getting these.
:AS40496 route: 74.123.208.0/21 descr: NexGenAcess, Inc. descr: 100 Lake St. descr: Delaware, Oh 43015 descr: US origin: AS40496 mnt-by: MNT-NEXGE-4 changed: matts [at] nexgenaccess.com 20181103 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.123.208.0/22 origin: AS40496 descr: NexGenAccess admin-c: MDS42-ARIN tech-c: MDS42-ARIN mnt-by: MNT-NEXGE-4 created: 2023-01-25T18:30:35Z last-modified: 2023-01-25T18:30:35Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.123.212.0/23 origin: AS40496 descr: NexGenAccess admin-c: MDS42-ARIN tech-c: MDS42-ARIN mnt-by: MNT-NEXGE-4 created: 2023-01-25T18:31:26Z last-modified: 2023-01-25T18:31:26Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 74.123.215.0/24 origin: AS40496 descr: NexGenAccess admin-c: MDS42-ARIN tech-c: MDS42-ARIN mnt-by: MNT-NEXGE-4 created: 2023-01-25T18:32:00Z last-modified: 2023-01-25T18:32:00Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.78.200.0/21 descr: NexGenAcess, Inc. descr: 100 Lake St. descr: Delaware, Oh 43015 descr: US origin: AS40496 mnt-by: MNT-NEXGE-4 changed: matts [at] nexgenaccess.com 20181103 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.78.200.0/21 descr: RR-RC-NexGenAccess - Columbus origin: AS40496 notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:00Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source