(ANSI) The private, non-profit organisation (501(c)3) responsible for approving US standards in many areas, including computers and commUNIcations. ANSI is a member of ISO. ANSI sells ANSI and ISO (international) standards. ANSI Start . Address: New York, NY 10036, USA. Sales: 1430 Broadway, NY NY 10018. Telephone: +1 (212) 642 4900. (2004-01-14)