These entries are queried from radb.net using whois, you can try my project getting these.
:AS264182 route6: 2804:23c8::/32 descr: Bloco de IP´s cliente "Silicom" criado pela equipe Durand do Brazil origin: AS264182 admin-c: Eduardo Fumes Parajo tech-c: Epafras Rezende Schaden mnt-by: MAINT-AS22356 changed: eduardo [at] durand.com.br 20150329 #20:51:26Z source: RADB last-modified: 2023-11-13T15:47:20Z rpki-ov-state: valid