<P> North American telephone area codes 281, 346, 713, and 832 serve Houston, Texas, and its environs. 713 is the main area code, while 281, 832 and 346 are overlay codes covering the same area . </P> <P> Area code 713 was one of the original area codes established with the North American Numbering Plan in October 1947 . It originally covered the entire southeastern quadrant of Texas, from the Sabine River to the Brazos Valley . </P>

What is the area code for houston tx
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