I didn't see this one mentioned: in addition to crossing city and county lines, ZIP codes also cross state lines. http://www.answers.com/Q/How_many_zipcodes_cr

I didn't see this one mentioned: in addition to crossing city and county lines, ZIP codes also cross state lines. http://www.answers.com/Q/How_many_zipcodes_cross_state_lines http://www.answers.com/Q/How_many_zipcodes_cross_state_lines