List of FTP server return codes

FTP (File Transfer Protocol) uses a set of numerical return codes to indicate the status of a command. Here’s a list of common FTP server return codes, categorized by their first number: ### 1xx: Informational - **110 Restart marker reply.** - **120 Service ready in nnn minutes.** - **125 Data connection already open; transfer starting.** - **150 File status okay; about to open data connection.