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:

St. Louis, Missouri
Kirkwood, Missouri
Maryland Heights, Missouri
Mehlville, Missouri
Oakville, Missouri
Spanish Lake, Missouri
University City, Missouri
Webster Groves, Missouri
Affton, Missouri
Ferguson, Missouri
Florissant, Missouri
Hazelwood, Missouri

Technical Specifications

NPA Code: 314
Overlay: Area Code 557
Location: Missouri, USA
Implementation Dates:
- Original: 1947
- Overlay: August 12, 2022

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

Local Calls: 10-digit dialing
Toll Calls: 1+10-digit dialing

Historical Milestones

1947: Area Code 314 was established as one of the original area codes.
1996: Area Code 573 was created from a split of 314.
1999: Area Code 636 was created from another split of 314.
2021: Transition to ten-digit dialing.
2022: Introduction of Area Code 557 overlay.

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.