The 314 area code covers Saint Louis, Ladue and 5 more places in Missouri.
Area code 314 is in Missouri, on Central Time. In the 314 area, phone numbers are given out in the City of St. Louis. It has been in service since 1947. 557 covers the same area, so two neighbours can have different area codes.
- Where
- City of St. Louis, Missouri
- Time zone
- Central Time
- In service since
- 1947, one of the original area codes
- Shares its area with
- 557 (since 2022)
- Prefixes in use
- 783
- How to dial
- Local calls need all 10 digits: 314-555-0142.
Find out who called you from a 314 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (314) number is on today, use our free carrier lookup.
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Saint Louis holds 38% of the phone prefixes in area code 314.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 783 prefixes in use shows where 314 numbers are actually given out.
- Saint Louis296 prefixes, 38%
- Ladue286 prefixes, 37%
- Kirkwood90 prefixes, 11%
- Creve Coeur51 prefixes, 7%
- Sappington25 prefixes, 3%
- Mehlville24 prefixes, 3%
- Oakville11 prefixes, 1%
Southwestern Bell (AT&T) holds the most phone number prefixes in area code 314: 252 of 783.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 783 prefixes in use in 314 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| Southwestern Bell (AT&T)AT&T's landline company | 252 | 32% |
| AT&T MobilityMobile network | 101 | 13% |
| T-MobileMobile network | 94 | 12% |
| Teleport (AT&T)AT&T's business phone network | 26 | 3% |
| Level 3 (Lumen)Lumen's business and wholesale network | 24 | 3% |
| American MessagingPaging network | 20 | 3% |
| 25 other carriers | 266 | 34% |
63% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
314 has been split 2 times and overlaid once since 1947.
1947
314 is one of the original North American area codes.
1996
On January 7, 1996, 573 splits off and takes part of the 314 area.
1999
On May 22, 1999, 636 splits off and takes part of the 314 area.
2022
On August 12, 2022, 557 is added on top of 314, so new numbers here can get either code.
A 314 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 314 are 636, 573 and 618.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
These are the questions people ask most about area code 314.
Where is area code 314?
314 covers Saint Louis, Ladue, Kirkwood and Creve Coeur and 3 more places in Missouri. In the 314 area, phone numbers are given out in the City of St. Louis.
What state is area code 314 in?
Missouri. 314 is a Missouri area code on Central Time.
What cities use area code 314?
The places holding the most 314 prefixes are Saint Louis, Ladue, Kirkwood, Creve Coeur, Sappington, Mehlville and Oakville. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 314?
No single phone company owns 314. NANPA's records show Southwestern Bell (AT&T) holds the most 314 prefixes, 252 of 783, followed by AT&T Mobility and T-Mobile. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 314 in?
314 is on Central Time.
When did area code 314 start?
314 is one of the original North American area codes, in service since 1947.
Is 314 the same area as 557?
Yes. 557 (since 2022) covers the same ground as 314. Nobody's number changed when it was added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 314 number?
Local calls need all 10 digits: 314-555-0142.
Is 314 a toll-free number?
No. 314 is a regular area code for Saint Louis and Ladue in Missouri, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 314?
The closest are 636 (Saint Charles, Missouri), 573/235 (Columbia, Missouri), 618/730 (Collinsville, Illinois) and 217/447 (Springfield, Illinois), measured between the centres of each area.
Who called me from a 314 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 314 a scam?
314 is a real Missouri area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.