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Area Codes/557
Missouri State flag557 area code

Get a local phone number in St. Louis, MO

Biggest city

St. Louis

StateMissouri
Major Cities

St. Louis area (proposed for future use).

Timezone

Central (GMT -6)

Zip codes

63101•63199

Population

319,294

Unemployment

3.30%

Avg. Income

$70,189

Nearby Area Codes
217573

Last updated: December 13, 2025

557 • St. Louis

Starting at

$7/mo

Get started

557 area code summary

The 557 area code is a planned area code for the state of Missouri, specifically designated to serve the St. Louis metropolitan area. Here are some key points about it:

Future Overlay for the St. Louis Area: The 557 area code is intended as an overlay to the existing 314 area code, which currently serves the city of St. Louis and parts of its surrounding suburbs. The introduction of 557 is in response to the growing demand for new phone numbers in the region, driven by population growth and the proliferation of digital devices and services. Supporting a Growing Urban Population: The St. Louis region, which will be served by the 557 area code along with 314, is a significant urban and economic hub in Missouri. The area is known for its rich history, cultural institutions, and as a center for industries such as healthcare, education, and manufacturing. The new area code will support the high volume of communication necessary for the region's continued growth and development. Adapting to Technological and Demographic Changes: The implementation of the 557 area code as an overlay reflects the need to adapt to the evolving telecommunications landscape. It ensures a steady supply of phone numbers while avoiding the disruption of changing existing numbers. This strategic move is indicative of the region's ongoing development and its ability to evolve with changing communication needs.

The introduction of the 557 area code represents the St. Louis area's growth and adaptability, ensuring the continuity and efficiency of telecommunication services for one of Missouri's most populous and dynamic regions.

Fun fact 💡

557 could support future growth in the Great Lakes region.

🏢 First Phone Company

N/A (to be determined)

📲 Get a 557 number: $7/mo
Customer Stories

What our users are saying

8 hrs
Saved weekly
The voice transcription feature saves us hours every week. Our whole team can search past calls and the quality is surprisingly accurate. Worth every penny.
DP

Dimitrios Papandreou

Team Lead

Why Phone2?

More than just a 557 number

Get a complete business phone system with features that help you never miss a customer.

40%
fewer missed calls

Shared Team Numbers

Your whole team shares one business number. When someone is busy, another teammate answers. No more missed opportunities.

24/7
call coverage

Smart Call Routing

Route calls by schedule, team, or IVR menu. After-hours calls go to voicemail or forward to on-call staff.

2+ hrs
saved per week

AI Transcription

Every voicemail and call automatically transcribed. Search conversations, catch details you missed, skip the playback.

50%
faster follow-ups

Unified Inbox

Calls, texts, and voicemails in one thread per contact. Your whole team sees the full conversation history.

3
platforms supported

Works Everywhere

iOS, Android, and web apps. Make calls from your laptop, take texts on your phone. Your number travels with you.

2 min
setup time

Instant Activation

Pick a number, download the app, start calling. No hardware, no technicians, no waiting. Works immediately.

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Starting at $7/month • 30-day refund guarantee • Cancel anytime

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