These entries are queried from radb.net using whois, you can try my project getting these.
:AS53275 route: 8.20.64.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS53275 remarks: proxy object for Graham Partners mnt-by: MAINT-AS7922 changed: john_ta [at] cable.comcast.com 20130621 #21:28:42Z source: RADB last-modified: 2023-11-13T15:54:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.136.238.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS53275 remarks: proxy object for Graham Partners mnt-by: MAINT-AS7922 changed: brian_malik [at] cable.comcast.com 20130618 #16:32:14Z source: RADB last-modified: 2023-11-13T15:54:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source