These entries are queried from radb.net using whois, you can try my project getting these.
:AS2738 route: 192.31.104.0/24 descr: Comcast cable Communications, Inc. 1800 Bishops Gate Blvd Mt laurel, NJ 08054 origin: AS2738 remarks: Proxy object for customer Shields Health Care Group mnt-by: MAINT-AS7922 changed: stuart_nickerson [at] cable.comcast.com 20140523 #21:50:43Z source: RADB last-modified: 2023-11-13T15:54:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source