These entries are queried from radb.net using whois, you can try my project getting these.
:AS13554 route: 50.84.184.0/24 descr: RR-RC-Tenaska Power Services Co-Texas origin: AS13554 admin-c: IPADDREG tech-c: IPADDREG notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20200401 #21:42:43Z source: RADB last-modified: 2023-11-13T16:15:19Z rpki-ov-state: valid route: 63.96.229.0/24 descr: RR-RC-Tenaska Power Services Co-Texas origin: AS13554 admin-c: IPADDREG tech-c: IPADDREG notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20200401 #21:42:43Z source: RADB last-modified: 2023-11-13T16:15:19Z rpki-ov-state: valid route6: 2620:ec:4000::/48 descr: Tenaska origin: AS13554 mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source