Missouri, located in the Midwestern United States, has a diverse telecommunications landscape characterized by several area codes that serve its population of approximately 6 million. Originally, Missouri was assigned the area code 314 when the North American Numbering Plan was introduced in 1947. This code served the cities of St. Louis and its nearby suburbs.
As the population grew and demand for telephone services increased, new area codes were introduced. In 1991, area code 816 was split from 314 to accommodate the western regions of the state, including Kansas City. Subsequently, additional area codes were introduced: 573 in 1996 to serve the southern and central portions of Missouri, and 636 in 1999 for the suburban areas of St. Louis.
Each area code reflects the geographic and demographic distinctions within the state. For instance, 314 encompasses the urban core of St. Louis, while 816 represents the broader Kansas City metropolitan area. The distribution of area codes also illustrates Missouri’s growth and urban development patterns, particularly in the last few decades.
Moreover, Missouri has been proactive in adopting new telecommunication technologies, including the transition to wireless services and the rise of Voice over Internet Protocol (VoIP). This evolution has influenced dialing practices, with ten-digit dialing now standard across all area codes in the state, reflecting a growing need for telephone number resources. As Missouri continues to evolve in the telecommunications sector, the infrastructure supporting its area codes remains vital to ensuring effective connectivity for its residents.
Affton (MO)
Ferguson (MO)
Florissant (MO)
Hazelwood (MO)
Kirkwood (MO)
Maryland Heights (MO)
Mehlville (MO)
Oakville (MO)
Spanish Lake (MO)
St. Louis (MO)
University City (MO)
Webster Groves (MO)
Joplin (MO)
Springfield (MO)
Cape Girardeau (MO)
Columbia (MO)
Jefferson City (MO)
Ballwin (MO)
Chesterfield (MO)
O’Fallon (MO)
Saint Charles (MO)
Saint Peters (MO)
Wildwood (MO)
Sedalia (MO)
Belton (MO)
Blue Springs (MO)
Gladstone (MO)
Grandview (MO)
Independence (MO)
Kansas City (MO)
Lee’s Summit (MO)
Liberty (MO)
Raytown (MO)
Saint Joseph (MO)
Missouri has 6 area codes (314, 636, 816, 573, 417, 660). These area codes are split between cities or states, so if you want to call to Missouri, you need to know exactly where you would like to call.
The first 3 digits to call Missouri may vary depending on where you want to call to, being one or the other depending on the region or city. Take a look at our listing above to find out which area code you need.
Calling Missouri from another state in the United States is considered a long-distance call. Here’s how to make the call: First, dial the area code for Missouri. Each state, and sometimes specific cities within a state, has unique area codes. Then, enter the 7-digit phone number of the person or business you’re trying to reach. If you’re calling from a landline, check with your provider, as long-distance charges may apply. However, most mobile carriers in the U.S. offer nationwide calling without additional fees. Alternatively, you can use VoIP or internet-based calling apps, like Skype, Zoom, or WhatsApp, to bypass traditional long-distance charges. The number you want to reach should look like this: 1-(AreaCode)-111-2222.
When making calls within the United States, dialing +1 depends on several factors. On most modern mobile phones, carriers automatically recognize the country code when calling within the U.S., so dialing +1 is usually not required; you can simply enter the area code followed by the phone number, such as 213-555-1234. If you’re using a landline, dialing 1 (the U.S. country code) before the area code and phone number is often necessary for long-distance calls; for example, calling from one state to another may require dialing 1-213-555-1234. When calling the U.S. from another country, dialing +1 is necessary, so a call from abroad would be formatted as +1-213-555-1234. VoIP and internet-based calling platforms, like Skype and WhatsApp, generally handle country codes automatically, making it unnecessary to dial +1 manually for U.S. numbers.
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