ISO 646-ES
From Just Solve the File Format Problem
ISO 646-ES (646-ES, ISO IR-17, IR-17) is one of several 7-bit character encodings in the ISO/IEC 646 series which are national variants, replacing some of the ASCII characters with other characters suitable for particular languages. This one is aimed at the Spanish market. An alternative version with some differences in the character set and code points is ISO 646-ES2.