These entries are queried from radb.net using whois, you can try my project getting these.
:AS30395 route: 50.220.4.0/22 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS30395 remarks: Proxy add for EDIA customer SwedishAmerican Health System mnt-by: MAINT-AS7922 changed: orin_flaharty [at] cable.comcast.com 20200310 source: RADB last-modified: 2023-11-13T16:00:10Z rpki-ov-state: valid route: 209.94.48.0/22 origin: AS30395 descr: SwedishAmerican Health System 1401 East State Street Rockford IL 61104 United States admin-c: WELTZ2-ARIN tech-c: JSM291-ARIN tech-c: WELTZ2-ARIN mnt-by: MNT-SAHS-2 created: 2023-06-12T20:13:12Z last-modified: 2023-06-12T20:14:52Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 209.94.50.0/24 origin: AS30395 descr: SwedishAmerican Health System 1401 East State Street Rockford IL 61104 United States admin-c: WELTZ2-ARIN tech-c: JSM291-ARIN tech-c: WELTZ2-ARIN mnt-by: MNT-SAHS-2 created: 2023-06-14T13:32:15Z last-modified: 2023-06-14T13:32:15Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source