Frequently Asked Questions
St. Louis, Missouri primarily uses area code 314. However, due to increased demand, area code 557 was added as an overlay in 2022. Therefore, both 314 and 557 serve St. Louis.
Area code 314 covers St. Louis City and several inner-ring suburbs in St. Louis County, Missouri. Some of the included suburbs are Kirkwood, Maryland Heights, Mehlville, and University City.
Mandatory 10-digit dialing for area code 314 began on October 24, 2021, due to the implementation of the 988 National Suicide Prevention Lifeline.
St. Louis now has two area codes (314 and 557) to accommodate the growing demand for phone numbers. The 557 overlay was implemented in 2022.
The area code overlay for 314 is 557. It was introduced on August 12, 2022, to ensure sufficient phone numbers for the region.
Area code 557 is an overlay of the 314 area code and therefore covers the same geographic region. This includes the city of St. Louis and inner-ring suburbs in St. Louis County, Missouri.
Area code 573 was split from area code 314 in 1996 to accommodate the growing need for phone numbers in the region.
In 1999, area code 636 was split from area code 314 to handle the increasing demand for phone numbers in the St. Louis metropolitan area.
Area code 636 was created from 314 in 1999.
You must dial 1 + the 10-digit number (including area code) for all calls to a 314 number, whether local or long-distance.
Area code 314, located in Missouri, observes Central Time.
The Missouri Public Service Commission (MPSC) is responsible for regulating telecommunications services within area code 314.
The St. Louis metro area is covered by area codes 314, 557, 636, and 573. Area codes 314 and 557 serve the city of St. Louis and its inner ring suburbs.
Area code 314 covers the city of St. Louis and many of its inner-ring suburbs. This includes Kirkwood, Maryland Heights, Mehlville, Oakville, Spanish Lake, University City, Webster Groves, Affton, Ferguson, Florissant, and Hazelwood.
You must dial 1 + the 10-digit number (including the area code) to reach a 314 number. This rule applies even when calling from within the same area code. 10-digit dialing became mandatory in 2021.
Area code 314 was one of the original North American Numbering Plan (NANP) area codes established in 1947. It has since been split to create area codes 573 in 1996 and 636 in 1999.
The overlay area code for 314 is 557. This means both area codes serve the same geographic region, and 10-digit dialing (including the area code) is required for all calls.
Area code 314 primarily serves the city of St. Louis and parts of surrounding St. Louis County, Missouri. It covers several municipalities in the county, including Kirkwood, University City, and Ferguson.
Even when calling within area code 314, you must dial the full 10-digit number. This includes the 314 area code and the seven-digit phone number. 10-digit dialing became mandatory in October 2021.
Area codes 573 and 636 were both split from the original 314 area code. 573 was created in 1996 and 636 followed in 1999, both to address the growing need for phone numbers.
Area code 314 is located within the state of Missouri, USA. It primarily serves the city of St. Louis and surrounding areas within St. Louis County.
Area Code 314: Coverage, Cities, and Key Information
Area Code 314 is a crucial part of St. Louis, Missouri's telecommunications landscape. This guide provides a comprehensive overview of its geographic coverage, major cities, regulatory framework, and historical milestones.
What is Area Code 314?
Area Code 314 serves the city of St. Louis and its inner-ring suburbs. It was one of the original area codes established in 1947 as part of the North American Numbering Plan (NANP). In 2022, it was overlaid with Area Code 557 to accommodate the growing demand for phone numbers.
Geographic Coverage of Area Code 314
Area Code 314 encompasses most of St. Louis and parts of neighboring St. Louis County. Here are some major cities included in this area code:
Technical Specifications
Dialing and Regulatory Information
Since October 24, 2021, ten-digit dialing is mandatory for all calls within the 314 area due to the implementation of the 988 National Suicide Prevention Lifeline. This change was overseen by the Missouri Public Service Commission, which regulates telecommunications in the state.
Dialing Requirements
Historical Milestones
Telecommunications Services and Carriers
Area Code 314 supports a variety of telecommunications services, including landline, wireless, and VoIP. Major carriers in the region include:
Conclusion
Area Code 314 remains a vital part of the telecommunications infrastructure in St. Louis, Missouri. By adapting to technological advancements and regulatory changes, it continues to serve the growing needs of its residents and businesses.
For more information on area codes and regulations, visit the North American Numbering Plan Administration.