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US area code · Missouri

Area code 557

Where the 557 area code is, its overlay and how to dial a +1 557 number from anywhere.

CoversMissouriTime zoneCentral (CT)TypeOverlay
Quick answer

The 557 area code is in Missouri, United States (Central (CT)). To call from abroad: +1 557 555-0123. It is an overlay, so all 10 digits are dialled.

StateMissouri
Time zoneCentral (CT)
TypeOverlay
10-digit dialingRequired
In service since30-Oct-2000

The 557 area code is a geographic North American Numbering Plan (NANP) code covering Missouri. It has been in service since 30-Oct-2000 and sits in the Central (CT) time zone.

Overlay 557 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

557314

How to dial a 557 number

From abroad+1 557 555-0123
Within the US / Canada1 557 555-0123
Locally (same area)557 555-0123

Other Missouri area codes

235314417573636660816975

Frequently asked questions

Where is the 557 area code?

The 557 area code is in Missouri, United States (Central (CT)).

Is 557 an overlay area code?

Yes. 557 overlays the same region as 314, so callers dial all 10 digits.

Do I have to dial 10 digits for 557?

Yes — dial the area code plus the seven-digit number.

How do I call a 557 number from another country?

Dial your exit code (or +), then 1, then 557, then the number: +1 557 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 557 number does not pinpoint a street or ZIP code.

Missed a call from +1 557?

In the 30 days to September 24, 2026, 19 unwanted calls showing a 557 number were reported to the US Federal Trade Commission, 47% of them recorded messages or robocalls. That puts 557 at #398 of 670 area codes reported.

Other13
Calls pretending to be government, businesses, or family and friends4
Dropped call or no message1
Before you call back
  • If you do not know anyone in Missouri, do not call back: a genuine caller will leave a message or send a text.
  • Scammers fake the number shown on caller ID, so a 557 number can hide a caller anywhere in the world.
  • Never give a code received by text or a bank detail to an unknown caller. In the US, calls can be reported at reportfraud.ftc.gov.

Who issues +1 557 numbers

Phone companies hold blocks of numbers in each area code. The main holders in 557:

New Cingular Wireless PCS, LLC 23Onvoy, LLC 17Teleport Communications America, LLC 15Multiple Ocn Listing 9Cellco Partnership Dba Verizon Wireless 8 5

About 34.7% of the 95 prefixes in use belong to mobile carriers: a 557 number is often a cell phone, and it may have moved to another carrier since.

Sources: FTC Do Not Call reported calls (numbers as reported by consumers, not verified), NANPA central office code assignments.

All US area codes United States +1 Map of area code 557 — cities & rate centres