Question 774048
Before 1995:
For beginning number,
2,3,4,5,6,7,8, or 9 are allowed
That is 8 digits allowed
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2 digits are allowed for 2nd number
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3rd number has 0 through 9 allowed
That is 10 digits allowed
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There are {{{ 8*2*10 = 160 }}}
possible area codes
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Beginning with 1995:
{{{ 8*10*10  = 800 }}} possible area codes
{{{ 800 - 160 = 640 }}} new area codes
made available