These entries are queried from radb.net using whois, you can try my project getting these.
:AS12088 route: 198.252.230.0/24 descr: ADDED FOR - AS12088 origin: AS12088 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net 20200707 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.252.230.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS12088 remarks: Proxy Route Add for Comcast Customer mnt-by: MAINT-AS7922 changed: dave_hill [at] cable.comcast.com 20121219 #19:24:06Z source: RADB last-modified: 2023-11-13T15:54:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source