Clayton, Missouri
Central Time Zone (UTC-6) · MO · —
About Area Codes in Clayton, Missouri
Clayton, Missouri is served by 2 area codes: 314, 557. When multiple area codes serve the same geographic area, it typically indicates overlay codes have been added to accommodate growing demand for phone numbers. All local calls within Clayton require 10-digit dialing. The city is in the Central time zone (UTC-6).
Other cities in area code 314
Frequently Asked Questions
What area code is Clayton, Missouri?
Clayton, Missouri uses area codes 314 and 557.
What time zone is Clayton in?
Clayton is in the Central time zone (UTC-6).
Do I need to dial 10 digits when calling Clayton?
Yes, all local calls in Clayton require 10-digit dialing because the area is served by multiple overlay area codes.
When was area code 314 created?
Area code 314 is one of the original 86 area codes established in 1947 as part of the North American Numbering Plan (NANP).
What cities share area code 314 with Clayton?
Other cities sharing area code 314 with Clayton include Bridgeton, Ferguson, Florissant, Hazelwood, Jennings, among others.
Clayton, MO · Central Time Zone