Area codes 713, 281, 832, and 346
Area codes 713 , 281 , 832 , and 346 are telephone area codes in the North American Numbering Plan ( NANP ) forming an overlay complex for Houston , Texas and its environs . 
<triplet> North American Numbering Plan <subj> area code <obj> instance of <subj> overlay complex <obj> has parts of the class