These entries are queried from radb.net using whois, you can try my project getting these.
:AS54178 route: 74.126.16.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS54178 remarks: Proxy Route Add for Comcast Customer mnt-by: MAINT-AS7922 changed: dave_hill [at] cable.comcast.com 20120825 #12:39:35Z source: RADB last-modified: 2023-11-13T15:54:10Z rpki-ov-state: valid route: 74.126.16.0/24 descr: ADDED FOR - AS54178 origin: AS54178 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20191213 source: LEVEL3 rpki-ov-state: valid route: 198.246.204.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS54178 remarks: Proxy Route Add for Comcast Customer mnt-by: MAINT-AS7922 changed: dave_hill [at] cable.comcast.com 20120825 #12:37:39Z 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: 198.246.205.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS54178 remarks: Proxy Route Add for Comcast Customer mnt-by: MAINT-AS7922 changed: dave_hill [at] cable.comcast.com 20120825 #12:35:09Z source: RADB last-modified: 2023-11-13T15:54:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source