These entries are queried from radb.net using whois, you can try my project getting these.
:AS16750 route: 63.166.166.0/24 descr: PNAP-HOU c2cfiber routes origin: AS16750 mnt-by: MAINT-AS1828 changed: cgwyn [at] internap.com 20060327 source: RADB last-modified: 2023-11-13T16:13:55Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 76.1.122.0/23 descr: EMBARQ HSD origin: AS16750 mnt-by: EMBARQ-MNT changed: casey.w.grover [at] centurylink.com 20100127 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source