NPA-NXX - 609-423

This is the 609-423 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!

1. Area Codes
2. 609
3. 609-423

The 609-423 subcode mainly covers Princeton in Mercer county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of New Jersey state. Many of the numbers in this subcode are Regular Landline registered to Ymax Communications. We hear they employ a large number of people in the New Jersey office.
Recently there have been an increase in reported calls, we've had over 366513 comments across our systems for the 609-423 subcode.