Prior to 2002, the TAC was six digits long and was followed by a two-d... - dofaq.co
international mobile station equipment identity

Prior to 2002, the TAC was six digits long and was followed by a two-d...

 wikipedia - 07 Oct 2015
Prior to 2002, the TAC was six digits long and was followed by a two-digit Final Assembly Code (FAC), which was a manufacturer-specific code indicating the location of the device's construction. From January 1, 2003 until that April 1, 2004, the FAC for all phones was 00. After April 1, 2004, the Final Assembly Code ceased to exist and the Type Allocation Code increased to eight digits in length.

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