These entries are queried from radb.net using whois, you can try my project getting these.
:AS16508 route: 12.49.6.0/24 descr: RR-RC-AEG-Pacwest origin: AS16508 notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20190424 #20:22:20Z source: RADB last-modified: 2023-11-13T16:15:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source