According to North American Numbering Plan, 815640 located in OTTAWA, Illinois. the first three digits 815 locate to state Illinois, 640 locate the city OTTAWA, furthermore, we also provide some other information such as the zip code example(s) 61350, carrier TELEPORT COMMUNICATIONS AMERIC, and the latitude and longitude is 41.3487 -88.8468. 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.