These entries are queried from radb.net using whois, you can try my project getting these.
:AS46563 route: 204.144.12.0/22 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS46563 remarks: Proxy add for EDIA customer Stonehill College mnt-by: MAINT-AS7922 changed: orin_flaharty [at] cable.comcast.com 20160809 source: RADB last-modified: 2023-11-13T15:54:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source