Louis, Missouri is 314. In fact, most of the city and its inner-ring suburbs use this code.
However, due to the proliferation
of cell phones and other devices requiring phone numbers, a newer overlay area code, 557, was Oman Phone Number List added to the 314 numbering plan in August 2022. This means new phone numbers assigned in the St. Louis area might use either 314 or 557.
So, if you see a phone
number with KCRJ either 314 or 557 as the area code, you can be sure it originates from the St. Louis, Missouri metropolitan area.
The area code for St