A local number. A little more freedom.

Get a 557
phone number.

A local number for St. Louis, MO. Call and text over WiFi or mobile data, on the phone you already have.

  • Calls and texts
  • No extra SIM
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Location
St. Louis, Missouri
Time zone
Central (GMT -6)

Where is area code 557 located?

Area code 557 is a Missouri area code, serving St. Louis, MO and nearby cities including St. Louis area (proposed for future use). It is in the Central (GMT -6) time zone.

Who is calling from area code 557?

A 557 call comes from a number assigned to the St. Louis, MO area, which can be a mobile, a landline or an app-based number like AvoCall's. Caller ID can be faked from any area code, so if you don't know the number, let it go to voicemail and never share a code you didn't ask for.

How do I get a 557 phone number?

Pick an available 557 number and sign up for AvoCall. Your new St. Louis, MO number works for calls and texts on your existing phone over WiFi or data. No second SIM is needed. Right now 20 numbers in the 557 area code are available on this page (checked October 11, 2026 at 8:39 AM UTC).

Find one that feels like yours

Choose a 557 number

20 numbers listed · Checked October 11, 2026 at 8:39 AM UTC.

Checked hourly

Every number requires an AvoCall plan. Current web pricing is verified at checkout, and number availability changes often.

About the 557 area code

St. Louis, Missouri is the home base of area code 557. The code sits in the Central time zone (GMT -6) and applies to the St. Louis area.

Approved as an overlay of area code 314, 557 entered service in 2022 and is earmarked for future use across the St. Louis area. As with any overlay, numbers from both codes mix within one territory, and local dialing runs to ten digits.

Dialing note: 557 is part of an overlay complex with 314, so local calls in this area are dialed with all ten digits.

Numbering details on this page (service dates and overlay status) are checked against the NANPA numbering registry. Registry data as of 10/08/2026.

557 phone number FAQ

Can I receive verification codes on a 557 number?
AvoCall 557 numbers support calling and messaging. Verification-text compatibility varies by sender; short-code and 2FA delivery is not guaranteed.
Which 557 numbers are available right now?
As of October 11, 2026 at 8:39 AM UTC, 20 557 numbers were available to claim on this page. Inventory is re-checked hourly and changes as numbers are claimed, and availability is confirmed at checkout. See the current list.