These entries are queried from radb.net using whois, you can try my project getting these.
:AS393273 route: 216.48.192.0/18 origin: AS393273 descr: Education Service Center, Region 17 1111 W. Loop 289 Lubbock, TX 79416 admin-c: CDA3 tech-c: NT2026-ORG remarks: Registered by ENA on behalf of ESC17 mnt-by: ENA changed: ne [at] ena.com 20190710 #16:40:18Z source: RADB last-modified: 2023-11-13T15:56:44Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source