NPA-NXX - 312-509

This is the 312-509 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 312-509 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 Peerless Network. 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 312-509 subcode.

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

662-963-6945 540-661-4212 715-895-2674 225-443-3500 765-580-5042
319-868-4828 646-259-2736 256-705-9722 623-455-5342 607-484-5282