These entries are queried from radb.net using whois, you can try my project getting these.
:AS14998 route: 208.50.115.0/24 descr: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 origin: AS14998 remarks: Proxy add for EDIA customer TSI, INC mnt-by: MAINT-AS7922 changed: jeffrey_mitten2 [at] cable.comcast.com 20170106 source: RADB last-modified: 2023-11-13T15:54:23Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source