557 Area Code Coverage (Missouri)
The 557 area code belongs to Missouri. The state abbreviation for this state is MO. This area code covers the following counties:
Resources
Missouri Demographics
Total Population: 5,595,211
Total Population (White:) 4,748,083
Total Population (Black/African American:) 629,391
Total Population (Asian:) 61,595
Households: 2,194,594
Average Household Size: 2.48
Total Housing Units: 2,442,017
Missouri Phone Numbers
Numbers starting with the following digits are valid Missouri phone numbers in the 557 area code:
