NPA-NXX - 551-231

This is the 551-231 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. 551
3. 551-231

The 551-231 subcode mainly covers Oakland in Bergen 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 Bandwidth.com. 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 905116 comments across our systems for the 551-231 subcode.