These entries are queried from radb.net using whois, you can try my project getting these.
:AS64287 route: 50.237.229.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mount Laurel, NJ 08054 origin: AS64287 remarks: Proxy entry for EDI customer mnt-by: MAINT-AS7922 changed: courtney_smith [at] nospamcable.comcast.com 20180821 source: RADB last-modified: 2023-11-13T15:54:28Z rpki-ov-state: valid