NPA-NXX - 312-428

This is the 312-428 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 312-428 subcode mainly covers Chicago in Cook 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 Level 3. 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 5194675 comments across our systems for the 312-428 subcode.

Looking for a different number? Follow a link below to see our recently active.

256-601-7147 602-736-9339 929-384-6510 714-294-4154 313-766-2947
720-464-5745 916-914-4924 209-269-9137 325-704-2297 202-375-6678