FTP Status and Error Codes

FTP Status and Error Codes: "Comprehensive List of FTP Status and Error Codes
During your FTP sessions, you'll receive various numbered codes from servers. CuteFTP displays these codes in the log window. Some codes represent errors. Most others simply communicate the status of the connection. Here are brief explanations for the most common status and error codes.
100 Series
200 Series
300 Series
400 Series
500 Series
10000 Series "