These entries are queried from radb.net using whois, you can try my project getting these.
:AS264003 route: 143.0.68.0/22 descr: Bloco de ip´s cliente "Pronet" criado pela equipe Durand do Brazil origin: AS264003 admin-c: Eduardo Fumes Parajo tech-c: Epafras Rezende Schaden mnt-by: MAINT-AS22356 changed: eduardo [at] durand.com.br 20160108 #03:24:59Z source: RADB last-modified: 2023-11-13T15:48:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source