About this number
(617) 631 is a landline based telephone number operated by At&T Local 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 617 and Network Numbering Exchange (NXX - also known as a prefix) of 631. It has an Operating Company Number (OCN) of 7421. A Common Language Location Identifier (CLLI) of CMBRMA01OMD. 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.