| Missouri | 
| State of Missouri - Phone Code and Area Codes for Mobile, Whatsapp and Text Messages | 
| Phone and Whatsapp Codes in Missouri / MO - Area Code : 557 | 
| Area Code : 573 | 
| Area Code : 636 | 
| Area Code : 660 | 
| Area Code : 975 | 
| Area Code : 314 Eastern | 
| Area Code : 816 NorthWest | 
| Area Code : 417 SouthWest | 
| US Code List of Codes in USA. Area Code and Phone Information by City and State. |