NPA-NXX - 331-999

This is the 331-999 subcode (NPA-NXX) prefix page. Follow a prefix to find the number you are looking for. We divide our pages up to make them more user friendly to navigate!

The 331-999 subcode mainly covers Oswego in Kendall county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Illinois state. Many of the numbers in this subcode are Regular Landline registered to Bandwidth.com. We hear they employ a large number of people in the Illinois office.
Recently there have been an increase in reported calls, we've had over 114736 comments across our systems for the 331-999 subcode.

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407-986-8974 832-747-3031 832-364-6371 407-347-3069 626-758-9281
630-480-2999 469-240-5545 802-465-4684 541-305-5503 801-429-9777