NPA-NXX - 312-999

This is the 312-999 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 312-999 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 Xo Communications. 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 312-999 subcode.

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

573-625-7081 520-303-9880 620-484-9635 312-731-3260 208-575-9728
860-526-4201 760-887-8066 636-669-9162 862-225-7621 614-670-5924