Area code 557
Get a 557 phone number
To get a 557 phone number, pick an available 557 number below and sign up for AvoCall. Your new number works for calls and texts on the phone you already own over WiFi or data. Current web pricing is verified at checkout. No second SIM and no new device are required.
- Location
- St. Louis, MO, Missouri
- Time zone
- Central (GMT -6)
- Related area codes
- Related:314
The 557 area code covers St. Louis, MO and nearby Missouri communities.
Top 20 557 numbers available right now
Pulled live from our carrier network. Last updated: August 26, 2026 at 10:57 AM UTC.
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 07/16/2026.
557 phone number FAQ
- 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. Current web pricing is verified at checkout. There is no second SIM and no new device.
- Where is the 557 area code?
- It serves St. Louis, MO and nearby cities in Missouri, including St. Louis area (proposed for future use).
- 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.