NPA-NXX - 312-423
This is the 312-423 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 312-423 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 Level 3. 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 312-423 subcode.
Looking for a different number? Follow a link below to see our recently active.
787-997-9682 951-207-7922 484-283-1030 608-525-7257 213-204-3937207-313-1329 646-884-5323 863-547-3526 408-909-8949 805-220-9885