About this number
(603) 257 is a landline based telephone number operated by Freedom Ring Communications, L and is located in zip code 03801 in the city of Portsmouth, New Hampshire, which is in Rockingham County, and is in the Northeast. It has a Number Planning Area (NPA - also known as an Area Code) of 603 and Network Numbering Exchange (NXX - also known as a prefix) of 257. It has an Operating Company Number (OCN) of 8468. A Common Language Location Identifier (CLLI) of PTMONH07DS0. As well as a Local access and transport area (LATA) of 122. Zip code 03801 has a population of 21,532 as of the 2010 census.