Int B3 Fn 76  - Zipkey - Look Up City And State For Zipcode                [U]

   AH = 76h
   DX = zipcode region (0-999)
   CH = last two digits of zipcode (0-99)
   ES:DI -> buffer for name

Return: CF set on error
       AL = suggested state code, FFh if none
       ES:DI buffer filled with suggested city name
   CF clear if successful
       AL = ZIPKEY state code
       BX = area code (v2.0+)
       ES:DI points one byte beyond end of name

See Also: AH=75h,AH=78h,AH=7Eh