These entries are queried from radb.net using whois, you can try my project getting these.
:AS63050 route: 198.147.156.0/24 descr: Proxy Registration for MiTek Industries origin: AS63050 notify: dlnocip [at] charter.com notify: dldntnbb [at] charter.com mnt-by: MAINT-CHTR-WD changed: david.gleich [at] charter.com 20151201 #23:58:11Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source