These entries are queried from radb.net using whois, you can try my project getting these.
:AS393708 route: 50.224.2.0/24 origin: AS393708 descr: Safehouse data, permitted by Comcast to advertise to us mnt-by: MAINT-AS32703 changed: csorrell [at] intelligentfiber.com 20210826 #21:07:05Z source: RADB last-modified: 2023-11-13T16:11:28Z rpki-ov-state: valid