These entries are queried from radb.net using whois, you can try my project getting these.
:AS26046 route: 129.123.0.0/16 descr: This is a UEN Customer route. origin: AS26046 mnt-by: MAINT-AS210 changed: kgenessy [at] uen.org 20090413 #20:29:38Z source: RADB last-modified: 2023-11-13T15:57:01Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source