These entries are queried from radb.net using whois, you can try my project getting these.
:AS396174 route: 38.125.48.0/24 descr: Advent Capital Management, LLC origin: AS396174 mnt-by: MAINT-AS27506 changed: yikehara [at] lightower.com 20170803 source: RADB last-modified: 2023-11-13T15:51:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source