NPA-NXX - 312-320

This is the 312-320 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 312-320 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 Cellular (Dedicated) registered to At&t Mobility. 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 312-320 subcode.

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

760-565-2220 215-907-5095 620-649-3884 863-698-5662 813-918-3585
540-200-3295 507-219-8109 308-822-7204 925-560-4282 301-985-4241