These entries are queried from radb.net using whois, you can try my project getting these.
:AS19710 route: 64.156.172.0/22 descr: S4R-LAX origin: AS19710 notify: nwcontact [at] s4r.com mnt-by: S4R-MNT changed: andy [at] s4r.com 20010424 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source