NPA-NXX - 305-400

This is the 305-400 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. 305
3. 305-400

The 305-400 subcode mainly covers Miami in Miami-dade county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Florida state. Many of the numbers in this subcode are Regular Landline registered to At&t Southeast. We hear they employ a large number of people in the Florida office.
Recently there have been an increase in reported calls, we've had over 2496435 comments across our systems for the 305-400 subcode.