These entries are queried from radb.net using whois, you can try my project getting these.
:AS393550 route: 192.41.177.0/24 descr: Proxy Add for Charter Business Customer Sierra View origin: AS393550 mnt-by: MAINT-CHTR-WD changed: rob.beauvais [at] charter.com 20160422 #23:25:57Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: valid