Area Code 314: Get a St. Louis Phone Number

314 · St. Louis

What is the area code for St. Louis?

The area code for St. Louis, Missouri is 314, with overlay code 557 sharing the same geographic footprint. The 314 area code is a North American Numbering Plan geographic code assigned in 1947, covering the St. Louis City and Inner Suburbs region. It serves approximately 1,000,000 residents on the Central Time (CT) (UTC-6 / UTC-5 DST).

The 314 area code has 784 assigned central-office prefixes (NXX codes, the three digits after the area code) across 7 rate centers, with numbers allocated to roughly 36 carriers.

At 784 of the ~792 usable central-office prefixes, the 314 area code has about 99% of its numbering capacity assigned, and that near-exhaustion is part of why overlay code 557 was added to the region. See how 314 compares in our NXX prefix allocation analysis across 338 US area codes. (Prefix data: localcallingguide.com / NANPA, 2026.)

Where is area code 314? Location and map area

Area code 314 is located in Missouri, the United States. Its coverage area centers on St. Louis and spans the St. Louis City and Inner Suburbs region. If you received a call from a 314 number, the caller's number was assigned in this area — though with number porting and virtual numbers, the person may be calling from anywhere.

The 314 location sits in Central Time (CT), so local business hours run roughly 9 a.m.–5 p.m. CT. Neighboring Missouri area codes include 417, 573, 636.

For the full story — every city covered, overlay history, and local scam patterns — read the complete St. Louis area code guide.

All St. Louis area codes

St. Louis is served by 2 area codes across the metro area. 314 is the original 1947 code; the others were added as overlays or for surrounding suburbs.

• 314 (current page) — Overlay on the same metro, assigned 1947
• 557 — St. Louis — assigned 2022

Cities served by the 314 area code

The 314 area code covers 5 major cities and towns across the St. Louis City and Inner Suburbs region (MO):

Businesses across St. Louis and surrounding cities use 314 numbers to project local presence and lift call answer rates. Industry studies of local presence dialing consistently report answer-rate gains of 20–40% over toll-free or out-of-area numbers — a caller ID that matches the recipient's region looks familiar and gets picked up.

314 area code time zone and business hours

The 314 area code is in the Central Time (CT) zone (UTC-6 / UTC-5 DST). Standard business hours in 314 run 9 AM to 5 PM CT.

If you're calling into 314 from a different time zone, factor in the offset. For example, an Eastern Time business calling 314 at 9 AM ET reaches St. Louis at 8 AM CT — likely outside standard business hours.

History of the 314 area code

The 314 area code was one of the original 86 area codes assigned in 1947 when the North American Numbering Plan was first deployed. As St. Louis grew and number demand increased, overlay code 557 was added to serve the same geographic region — a common solution that avoids forcing existing subscribers to change their numbers.

• 1947 314 entered service (one of the 86 original NANP area codes)
• 2022 557 added to serve the same region

Is the 314 area code safe? Spam and scam calls

314 is a legitimate geographic area code for St. Louis — it is not a scam code or a premium-rate prefix, and a call from a 314 number is most likely a genuine local caller. The risk is not the area code itself but a tactic called neighbor spoofing: scammers fake their caller ID so an unwanted call appears to come from your own area code, because people answer familiar numbers more readily.

If you get an unexpected 314 call, a few signals point to a likely scam — a pre-recorded message, urgent pressure to act now, a demand for payment by gift card or wire transfer, or anyone asking for passwords, Social Security, or account numbers. Let suspicious calls go to voicemail, never share personal information, and report fraud to the FTC at reportfraud.ftc.gov.

The FCC consumer guide on spoofing explains your rights under the Truth in Caller ID Act. A real St. Louis business will leave a clear voicemail and will not pressure you.

US carriers verify caller ID with the STIR/SHAKEN framework, which flags many spoofed numbers as "Spam Likely" before they ring. DialPhone 314 numbers are registered for STIR/SHAKEN attestation, so calls from your business are verified as genuine and reach customers without a false spam label. See the DialPhone guide to VoIP security for more.

Why get a 314 area code number for your business?

Getting a 314 number gives your business three measurable advantages over a toll-free or out-of-area number:

1. Local trust signal. Customers in St. Louis recognize 314 as their home area code. Caller ID matching builds immediate credibility for service businesses, sales outreach, and patient communication.
2. Higher answer rate. Calls from a familiar local area code are answered far more often than unknown or toll-free numbers — industry measurements of local presence dialing put the lift at 20–40%, which matters most for outbound sales, appointment confirmations, and time-sensitive service callbacks.
3. Targeted marketing. Businesses serving St. Louis and the broader St. Louis City and Inner Suburbs can advertise a local number across print, radio, billboards, and digital channels for higher conversion than a national 800 number.

For businesses in St. Louis and surrounding cities, top industries that benefit from local 314 presence include Professional Services, Healthcare, and Retail. DialPhone's AI receptionist is available for every 314 number — never miss a call, even after standard business hours.

How to get a 314 area code number

Setting up a 314 business number with DialPhone takes under 10 minutes:

1. Sign up for a DialPhone plan. Choose any plan starting at $24/user/month. Free 14-day trial, no credit card required.
2. Search available 314 numbers. Filter the DialPhone number inventory by area code, city, or pattern.
3. Choose your number and configure. Assign your new 314 number to a user or team, set up call routing, voicemail, AI receptionist, and business SMS.
4. Port your existing number (optional). Already have a 314 number? Free number porting in 2 to 5 business days with zero service interruption.

New to local numbers? The complete guide to getting a local phone number covers choosing the right area code, porting an existing line, and avoiding spam flags.

314 area code overlay codes

The St. Louis City and Inner Suburbs region is served by multiple overlay area codes:

Area Code	Coverage
314	Primary area code for St. Louis City and Inner Suburbs, assigned 1947
557	Overlay — same geography (assigned 2022)

All overlay codes serve the same St. Louis region. New subscribers may be assigned any available code; existing numbers retain their original prefix.

AI receptionist for 314 area code businesses

Every DialPhone 314 number includes optional AI receptionist coverage, available 24/7. The AI handles calls when your team is unavailable — answering common questions, booking appointments, routing urgent callers to on-call staff, and capturing voicemail with full transcription and intent tagging.

For businesses in St. Louis that handle high call volume, run extended hours, or need bilingual support (especially valuable in service areas with diverse customer bases), the AI receptionist reduces voicemail backlog and improves first-call resolution.

All area codes in Missouri

Missouri has 9 active geographic area codes. The 314 area code is part of the same numbering plan as the codes listed below — calls between them are typically local within the state, depending on the carrier.

Nearby area codes

Related area codes in Missouri and the Central Time (CT) region:

• 417 area code — Springfield, Missouri
• 573 area code — Columbia, Missouri
• 636 area code — St. Peters, Missouri
• 660 area code — Sedalia, Missouri
• 816 area code — Kansas City, Missouri
• 235 area code — Columbia, Missouri

All Missouri area codes → · Browse all US area codes →

More area codes: ← 313 Detroit · 315 Syracuse →

How this page is verified

DialPhone re-verifies every area code page every 90 days. Area code geography, timezone, and overlay data come from the official North American Numbering Plan Administration (NANPA) database. Pricing reflects the published DialPhone plan tiers — see the pricing page for current details. Number availability varies; check the DialPhone signup flow for live inventory in the 314 region.

What to know before getting a 314 number

• Number availability is finite. Popular St. Louis area codes can be inventory-constrained — request specific vanity patterns early.
• Porting timing varies. Most 314 ports complete in 2-5 business days; complex multi-line legacy contracts can take 7-10.
• HIPAA tier required for healthcare. The Core $24 plan doesn't include a BAA — healthcare users need Advanced ($34) or above.