These entries are queried from radb.net using whois, you can try my project getting these.
:AS395779 route: 50.216.81.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS395779 remarks: Proxy add for EDIA customer Armstrong-395779 mnt-by: MAINT-AS7922 changed: rhyan_delapena [at] cable.comcast.com 20200505 source: RADB last-modified: 2023-11-13T16:00:38Z rpki-ov-state: valid