According to North American Numbering Plan, 603400 located in HOLLIS, New Hampshire. the first three digits 603 locate to state New Hampshire, 400 locate the city HOLLIS, furthermore, we also provide some other information such as the zip code example(s) 03049, carrier NEW CINGULAR WIRELESS PCS, LLC, and the latitude and longitude is 42.7352 -71.5885. 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.