314 Area Code: St. Louis Numbers, Cities, and the 557 Overlay
A St. Louis customer is far more likely to pick up a call from a number that looks like it's down the street. That's the quiet advantage a 314 number gives a business — instant local credibility in one of Missouri's biggest markets.
This guide explains exactly where the 314 area code reaches, why the 557 overlay arrived, and how 10-digit dialing changed things. You'll also see how to claim a 314 number even if you're nowhere near Missouri.
THE SHORT VERSION
The 314 area code serves the St. Louis metropolitan area in eastern Missouri. It's one of the original 1947 area codes and now shares its region with the 557 overlay.
If you only remember three things: 314 is St. Louis, all local calls now need 10 digits, and you don't need a Missouri address to get a 314 number.
WHERE THE 314 AREA CODE REACHES
The 314 area code is anchored to St. Louis and its inner ring of suburbs. It's a compact, urban code — not a sprawling rural one.
Counties Covered
The code spans three counties: St. Louis City, St. Louis County, and a portion of St. Charles County. St. Louis City is independent of any county, which is unusual in the U.S.
This tight footprint means a 314 number signals a genuinely metro-area presence, not a vague statewide one.
Key Cities and Suburbs
Coverage centers on the city of St. Louis and well-known suburbs in the surrounding county. These include some of the region's most active commercial zones.
| Area | Examples |
|---|---|
| St. Louis City | Downtown, Central West End, The Hill |
| Inner suburbs | Clayton, University City, Webster Groves, Maplewood |
| Outer suburbs | Florissant, Kirkwood, Creve Coeur, Bridgeton |
Time Zone
The 314 area code sits entirely in the U.S. Central Time Zone (UTC -6, or UTC -5 during daylight saving). That matters for scheduling support hours and call campaigns.
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A QUICK HISTORY OF THE 314 AREA CODE
The 314 area code is part of telecom history. It was one of the 86 original North American Numbering Plan codes assigned in 1947.
At first, 314 covered a huge slice of eastern Missouri. As demand grew, the region was split and trimmed repeatedly, leaving 314 focused on metro St. Louis.
That long history is part of why a 314 number still carries weight — locals recognize it instantly.
Thinking about a St. Louis presence? A local number is the cheapest, fastest way to test a new market before committing to an office. Many businesses start with a single virtual line and scale from there.
WHY THE 557 OVERLAY WAS ADDED
By the early 2020s, the supply of fresh 314 numbers was running low. Population growth, mobile lines, and business demand had drained the pool.
What an Overlay Is
An overlay adds a second area code on top of the same geographic region. Nobody's existing number changes — new numbers simply start carrying the new code.
This is different from a "split," where the map is divided and half the region gets a brand-new code.
The 557 Overlay in Practice
Area code 557 went into service on August 12, 2022, as an overlay for the entire 314 region. Both codes now serve the same St. Louis territory side by side.
So a neighbor on 314 and a neighbor on 557 can live on the same street — the codes are geographic twins.
HOW 10-DIGIT DIALING CHANGED LOCAL CALLS
The biggest practical change from the overlay is dialing. Seven-digit local calls no longer work in the St. Louis area.
What You Have to Dial Now
Every local call now requires the full 10 digits — area code plus the seven-digit number. This applies whether you're calling a 314 or a 557 line.
Your existing number stays exactly the same. Only the dialing habit changes.
What Businesses Should Update
Outdated seven-digit numbers on signage, websites, and marketing material can quietly cost you calls. Auto-dialers and stored contacts should also be checked.
A five-minute audit of every place your number appears prevents missed leads.
HOW TO GET A 314 NUMBER FOR YOUR BUSINESS
You don't need a storefront in St. Louis to use a 314 number. A virtual number routes calls to any phone, anywhere.
The Three-Step Path
Getting set up is fast with a cloud phone provider. Most numbers activate the same day.
- Pick a provider that offers U.S. local numbers and check 314 availability.
- Choose your number — search the inventory or request a memorable pattern.
- Route it to a mobile, desk phone, app, or your team's call queue.
Why a Virtual 314 Number Works
A virtual line gives you a local St. Louis identity without rent, hardware, or contracts. Calls forward wherever your team actually is.
For example, My Country Mobile (MCM) offers local U.S. numbers with same-day activation, call routing, and an app — a practical option if you're testing the St. Louis market remotely.
Ready to sound local in St. Louis? Claim a number, forward it to your existing phone, and start taking calls today — no new hardware required.
COMMON MISTAKES TO AVOID
A few avoidable errors cost businesses calls and credibility in overlay regions like St. Louis.
- Still publishing 7-digit numbers — they no longer connect; always show all 10.
- Assuming 557 isn't "real" St. Louis — it covers the exact same area as 314.
- Forgetting to update CRMs and dialers — stored 7-digit entries will fail.
- Buying a number without checking routing — confirm it forwards to the device you actually use.
THE BOTTOM LINE
The 314 area code remains St. Louis's signature code, and the 557 overlay simply expanded the number supply without changing the map. The only real adjustment for everyone is dialing all 10 digits.
If you want a foothold in the St. Louis market, start by securing a local number and pointing it at your current phone. You can be answering local calls within a day.
Want to explore other markets too? Browse our guides on the 469 area code, 210 area code, and 224 area code, or see how virtual phone numbers work.
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FAQs
What cities does the 314 area code cover?
It covers the city of St. Louis plus suburbs in St. Louis County such as Clayton, University City, Webster Groves, Florissant, and Kirkwood, along with part of St. Charles County.
When was the 314 area code established?
It was created in 1947 as one of the original North American area codes, originally serving a large part of eastern Missouri before being trimmed to metro St. Louis.
What is the 557 overlay?
The 557 area code is an overlay added on August 12, 2022. It covers the same St. Louis region as 314, adding new numbers without changing anyone's existing line.
Do I have to change my phone number because of the overlay?
No. Existing 314 numbers stay the same. The only change is that all local calls now require 10-digit dialing.
What time zone is the 314 area code in?
The entire 314 region is in the U.S. Central Time Zone, observing daylight saving time.
Can I get a 314 number if I don't live in Missouri?
Yes. A virtual phone provider can assign you a 314 number and route calls to any device, regardless of where you're physically located.
Is a 557 number worse than a 314 number?
No. Both codes serve the identical St. Louis area. A 557 number is just as local — it's simply newer.
