These entries are queried from radb.net using whois, you can try my project getting these.
:AS19131 route: 52.119.9.0/24 descr: ADDED FOR - AS19131 origin: AS19131 notify: noc [at] 123.net mnt-by: I123-MNT changed: rpd [at] 123.net source: LEVEL3 last-modified: 2023-02-06T15:45:46Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 52.119.9.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mount Laurel, NJ 08054 origin: AS19131 remarks: Proxy entry for EDI customer mnt-by: MAINT-AS7922 changed: courtney_smith [at] no.spam.cable.comcast.com 20171214 source: RADB last-modified: 2023-11-13T15:54:11Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 141.193.241.0/24 origin: AS19131 descr: Proxy registration for Living Essentials - AS19131 mnt-by: MAINT-AS30600 changed: miles.mccredie [at] metronetinc.com 20190819 #21:26:07Z source: RADB last-modified: 2023-11-13T15:57:04Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source