These entries are queried from radb.net using whois, you can try my project getting these.
:AS22913 route: 199.255.128.0/21 descr: CSS, Inc. descr: 1162 Barrow St. descr: Houma, LA 70360 descr: US origin: AS22913 mnt-by: MNT-CSS-139 changed: ed.spoon [at] cssla.com 20101104 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.255.128.0/21 origin: AS22913 descr: Computer Sales and Service (CSS) mnt-by: MAINT-AS5009 changed: ipadmin [at] eatel.net 20190621 #15:53:01Z source: RADB last-modified: 2023-11-13T15:56:40Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source