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The two area codes added in the 1999-2000 time period that overlay the 215 area code in Pennsylvania (Philadelphia area) are both multiples of 89: 267 = 3 * 89 and 445 = 5 * 89. [Litman]

Submitted: 2001-11-30 21:00:45; Last Modified: 2008-01-30 11:28:00.