Many FTP servers (like ProFTPD, vsftpd, or FileZilla) come with default accounts or are set up by hardware manufacturers with "hardcoded" credentials. A high-quality list should always start with common pairs like: admin : admin anonymous : (blank or email) root : toor ftp : ftp Targeted Permutations
If you are looking for pre-built, high-quality wordlists to test your FTP credentials, these are the industry standards: 1. SecLists ftp password wordlist high quality
The Ultimate Guide to High-Quality FTP Password Wordlists: Securing and Testing Your Servers Many FTP servers (like ProFTPD, vsftpd, or FileZilla)