These entries are queried from radb.net using whois, you can try my project getting these.
:AS39996 route: 199.21.162.0/24 descr: Panasonic Avionics Corporation descr: 26200 Enterprise Way descr: Lake Forest, California 92630 descr: US origin: AS39996 mnt-by: MNT-PAC-59 changed: Khalil.hicks [at] panasonic.aero 20170419 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source