According to North American Numbering Plan, 603620 located in MERRIMACK, New Hampshire. the first three digits 603 locate to state New Hampshire, 620 Cellular locate the city MERRIMACK, furthermore, we also provide some other information such as the zip code example(s) 03054, carrier UNITED STATES CELLULAR CORP. -, and the latitude and longitude is 42.8589 -71.4907. Please pay attention that the detail we provide only as a reference, the details of the zip code may be not complete, the latitude and longitude likely to have deviation.

Here are some random corresponding phone numbers.