On the Internet, "IEC" usually means the International Electrotechnical Commission.
ISO/IEC 24734 (International Standards Organization/International Electrotechnical Commission)
International Standards Organization/Internatio...(WhatIs.com)
ANSI (American National Standards Institute)
ANSI, American National Standards Institute, or...(SearchDataCenter.com)
In telephony, IEC may also refer to an "interexchange carrier" (a long-distance carrier).