These entries are queried from radb.net using whois, you can try my project getting these.
:AS14991 route: 65.171.176.0/21 descr: US Signal Customer route. origin: AS14991 mnt-by: I123-MNT changed: rpd [at] 123.net 20030522 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 65.171.176.0/21 descr: PNAP-CHG ussignal route origin: AS14991 mnt-by: MAINT-AS1828 changed: cely [at] internap.com 20030522 source: RADB last-modified: 2023-11-13T16:13:53Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.32.224.0/19 descr: US Signal Customer Route origin: AS14991 mnt-by: I123-MNT changed: rpd [at] 123.net 20030526 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.32.224.0/19 descr: PNAP-CHG ussignal route origin: AS14991 mnt-by: MAINT-AS1828 changed: sleibrand [at] internap.com 20040807 source: RADB last-modified: 2023-11-13T16:13:54Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.32.224.0/21 descr: PNAP-CHG ussignal route origin: AS14991 mnt-by: MAINT-AS1828 changed: cely [at] internap.com 20030522 source: RADB last-modified: 2023-11-13T16:13:53Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.32.232.0/21 descr: PNAP-CHG ussignal route origin: AS14991 mnt-by: MAINT-AS1828 changed: cely [at] internap.com 20030522 source: RADB last-modified: 2023-11-13T16:13:53Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.32.240.0/20 descr: PNAP-CHG ussignal route origin: AS14991 mnt-by: MAINT-AS1828 changed: cely [at] internap.com 20030522 source: RADB last-modified: 2023-11-13T16:13:53Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source