These entries are queried from radb.net using whois, you can try my project getting these.
:AS395581 route: 50.220.8.0/22 origin: AS395581 descr: Proxy registration for our customer: SIMMS Metals An LOA has been provided by Comcast for this prefix. mnt-by: MAINT-AS30600 changed: lee.fawkes [at] metronetinc.com 20220311 #23:07:23Z source: RADB last-modified: 2023-11-13T16:10:08Z rpki-ov-state: valid