NPA-NXX - 810-531

This is the 810-531 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. 810
3. 810-531

The 810-531 subcode mainly covers Port Huron in St. Clair county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Michigan state. Many of the numbers in this subcode are Miscellaneous registered to Sprint. We hear they employ a large number of people in the Michigan office.
Recently there have been an increase in reported calls, we've had over 163040 comments across our systems for the 810-531 subcode.