These entries are queried from radb.net using whois, you can try my project getting these.
:AS53874 route: 204.48.46.0/24 origin: AS53874 descr: Cytel Software Corporation notify: ipm [at] expedient.com mnt-by: MAINT-AS17054 changed: ipm [at] expedient.com 20221201 #19:46:52Z source: RADB last-modified: 2023-11-13T16:13:10Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source