These entries are queried from radb.net using whois, you can try my project getting these.
:AS19971 route: 170.249.72.0/21 origin: AS19971 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 remarks: Customer Q Center mnt-by: MAINT-AS7922 changed: wyatt_clarke [at] cable.comcast.com 20201008 #21:19:14Z source: RADB last-modified: 2023-11-13T16:02:24Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source