NPA-NXX - 573-503

This is the 573-503 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. 573
3. 573-503

The 573-503 subcode mainly covers Middletown in Montgomery county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Missouri 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 Missouri office.
Recently there have been an increase in reported calls, we've had over 12236 comments across our systems for the 573-503 subcode.