: Unlike some open domains, .br registrations often require a Brazilian tax ID (CPF or CNPJ), making the dataset uniquely tied to verified legal entities or residents. 2. Technical Processing of .txt Domain Lists

: Removing duplicates and non-resolving domains using Python scripts [26].

A file named .com.br.txt is usually a of URLs or domain names ending in Brazil's country-code top-level domain (ccTLD) [21]. These are frequently used in:

The .com.br domain is managed by , the executive arm of the Brazilian Network Information Center (NIC.br). It is one of the most popular ccTLDs globally due to Brazil's massive digital economy.