These entries are queried from radb.net using whois, you can try my project getting these.
:AS396415 route: 50.219.115.0/24 origin: AS396415 descr: Comcast Cable Communications, Inc 1800 Bishops Gate Blvd Mount Laurel, NJ 08054 mnt-by: MAINT-AS7922 changed: courtney_smith [at] cable.comcast.com 20230228 #18:31:05Z source: RADB last-modified: 2023-11-13T16:15:21Z rpki-ov-state: valid route6: 2620:21:e000::/48 descr: NET6-2620-21-E000-2 origin: AS396415 mnt-by: MNT-DC-747 changed: hostmaster [at] cci.drexel.edu 20170624 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source