About this number
(781) 640 is a wireless/mobile based telephone number operated by New Cingular Wireless Pcs, LLC and is located in zip code 02141 in the city of Cambridge, Massachusetts, which is in Middlesex County, and is in the Northeast. It has a Number Planning Area (NPA - also known as an Area Code) of 781 and Network Numbering Exchange (NXX - also known as a prefix) of 640. It has an Operating Company Number (OCN) of 4036. A Common Language Location Identifier (CLLI) of CMBSMA01GT0. As well as a Local access and transport area (LATA) of 128. Zip code 02141 has a population of 11,910 as of the 2010 census.