These entries are queried from radb.net using whois, you can try my project getting these.
:AS15245 route: 146.12.178.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS15245 remarks: Proxy add for EDIA customer Harte-H mnt-by: MAINT-AS7922 changed: rodney_finley [at] cable.comcast.com 20210524 source: RADB last-modified: 2023-11-13T16:05:46Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source