NPA-NXX - 312-523

This is the 312-523 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 312-523 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 Miscellaneous registered to Sprint. 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 312-523 subcode.

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

440-226-7524 512-932-5042 678-471-2934 734-461-2306 415-686-6759
520-271-1013 918-412-4704 832-765-6920 925-240-2424 843-468-8264