These entries are queried from radb.net using whois, you can try my project getting these.
:AS7300 route: 192.150.48.0/23 descr: InfoTrax origin: AS7300 mnt-by: MAINT-AS7029 changed: hbabeu [at] corp.earthlink.com 20150427 #13:05:01Z source: RADB last-modified: 2023-11-13T16:03:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source