These entries are queried from radb.net using whois, you can try my project getting these.
:AS17272 route: 192.251.87.0/24 descr: ROTH CAPITAL PARTNERS, LLC admin-c: MU1-LEVEL3 tech-c: MU1-LEVEL3 origin: AS17272 mnt-by: MASERGY-MNT changed: adnan.ahmed [at] masergy.com 20210216 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.251.87.0/24 descr: Roth Capital Partners, LLC 24 Corporate Plaza Newport Beach, CA 92660 US origin: AS17272 remarks: Route object for Roth Capital Partners, LLC notify: techs [at] rothcp.com mnt-by: MNT-RCP-10 changed: jdau [at] rothcp.com 20060302 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source