According to North American Numbering Plan, 503640 located in HILLSBORO, Oregon. the first three digits 503 locate to state Oregon, 640 locate the city HILLSBORO, furthermore, we also provide some other information such as the zip code example(s) 97123, 97124, carrier FRONTIER COMMUNICATIONS NORTHW, and the latitude and longitude is 45.5211 -122.9701. 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.