NPA-NXX - 618-637

This is the 618-637 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. 618
3. 618-637

The 618-637 subcode mainly covers Livingston in Madison county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Illinois state. Many of the numbers in this subcode are Regular Landline registered to Madison Telephone Company. We hear they employ a large number of people in the Illinois office.
Recently there have been an increase in reported calls, we've had over 269282 comments across our systems for the 618-637 subcode.