According to North American Numbering Plan, 203974 located in NEW HAVEN, Connecticut. the first three digits 203 locate to state Connecticut, 974 locate the city NEW HAVEN, furthermore, we also provide some other information such as the zip code example(s) 06510, 06519, 06511, carrier TELEPORT COMMUNICATIONS AMERIC, and the latitude and longitude is 41.3042 -72.9236. 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.