These entries are queried from radb.net using whois, you can try my project getting these.
:AS397777 route: 50.216.49.0/24 origin: AS397777 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mount Laurel, NJ 08054 remarks: Proxy entry for EDI customer TORANI mnt-by: MAINT-AS7922 changed: courtney_smith [at] cable.comcast.com 20200518 #20:06:03Z source: RADB last-modified: 2023-11-13T16:00:40Z rpki-ov-state: valid