Comment by dpifke

From your HN profile, I see you're in Brazil, which is part of the region IANA has delegated to LACNIC. Per [0], LACNIC has further delegated numbering authority in Brazil to Registro.br.

Following the links on that page (or performing a simple Google search) leads one to: https://registro.br/tecnologia/numeracao/como-solicitar/

[0]: https://www.lacnic.net/1016/2/lacnic/ip-request