NPA-NXX - 312-643

This is the 312-643 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 312-643 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 Rcn Telecom. 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 312-643 subcode.

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

850-366-4695 845-237-1795 616-986-5330 781-818-9300 770-741-6331
973-831-2277 301-962-2131 732-585-9928 732-956-5993 843-207-5419