These entries are queried from radb.net using whois, you can try my project getting these.
:AS503 route: 187.176.208.0/20 descr: RED-AXTEL-MX origin: AS503 mnt-by: MAINT-AS11172 changed: om_core [at] alestra.com.mx 20170203 #16:55:19Z source: RADB last-modified: 2023-11-13T15:50:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source