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Area Code 557 Location & Details

State / Region: Missouri • Country: United States

Major Cities Covered: St. Louis, University City, Kirkwood, Maryland Heights, Webster Groves, Arnold, Creve Coeur, Ferguson, Clayton, Overland

Standard Dial Format
+1 (557) XXX-XXXX
Country Code: +1 (NANP Format)
What State is Area Code 557?
MissouriState Hub →
Country Territory
United States
557 Area Code Time Zone
Central
557 Overlay Codes
314

Area Code 557 Geographic Map

Interactive location bounds and coverage area for Missouri (Central Timezone)

Lat: 38.66° • Lng: -90.34°
📍 Geographic Center: MissouriMap data © OpenStreetMap contributors

Where is Area Code 557 Located?

Telephone area code 557 is assigned to Missouri in United States. It serves cities and metropolitan communities including St. Louis, University City, Kirkwood, Maryland Heights, Webster Groves, Arnold, Creve Coeur, Ferguson, Clayton, Overland.

Historical Context & Area Code Overlay Information:557 serves Missouri (United States).

For local and long-distance calls within area code 557, standard 10-digit dialing (557) XXX-XXXX applies.

Who Called Me from Area Code 557?

Received an unknown call, missed call, or text scam from area code 557? Here is how to trace who is calling from 557 area code and verify unknown numbers safely:

1.
Identify Missed Calls & Voicemails:

Legitimate contacts usually leave a detailed voicemail or caller ID record.

2.
Watch Out for Neighbor Spoofing:

Robocallers often fake incoming caller ID numbers using your local 557 prefix to boost pick-up rates.

3.
Reverse Phone Lookup Area Code 557:

Search public white-pages or use caller intelligence guides before returning unfamiliar calls.

Learn How Reverse Phone Lookups Work→

How to Call Area Code 557 & Dialing Format

When placing a phone call to a number in area code 557, follow the correct dialing format depending on your calling location:

  • Calling from inside the US / Canada (+1): Dial 1 + (557) + 7-digit number.
  • Calling from an international location outside +1: Dial your country's international exit code (e.g. 011 in US or + on mobile) + 1 + 557 + 7-digit number.
  • Do I need to dial area code 557 for local calls? Yes, 10-digit dialing (area code + line number) is mandatory across North American telephone networks.

Top Cities & Municipalities Served in Area Code 557

Urban centers, census places, and communities within the +1-557 calling area

50 Major Cities Listed
City NameCountyPopulation% of 557 Pop
St. LouisSt. Louis city278,14440.1%
University CitySt. Louis city34,6575.0%
KirkwoodSt. Louis County29,3314.2%
Maryland HeightsSt. Louis County27,5594.0%
Webster GrovesSt. Louis County23,4503.4%
ArnoldSt. Louis County20,9943.0%
Creve CoeurSt. Louis County18,4802.7%
FergusonSt. Louis city17,9532.6%
ClaytonSt. Louis city17,8072.6%
OverlandSt. Louis County15,4742.2%
JenningsSt. Louis city13,0931.9%
St. AnnSt. Louis County12,6171.8%
CrestwoodSt. Louis County12,2071.8%
Town And CountrySt. Louis County11,6191.7%
Bellefontaine NeighborsSt. Louis city10,3681.5%
Des PeresSt. Louis County9,1021.3%
Richmond HeightsSt. Louis city9,0931.3%
Sunset HillsSt. Louis County9,0751.3%
OlivetteSt. Louis County8,9371.3%
LadueSt. Louis County8,9341.3%

Counties Covered by Area Code 557

Geographic county distribution and population coverage across Missouri

County NameTotal Population% of 557 Area% of County
St. Louis city280,44564.2%100%
St. Louis County991,66635.8%25%

☎️Area Code 557 Exchange Prefixes & Carriers

Showing 50 of 91 central office 3-digit prefixes and assigned telecom carriers

46% Landline32% Wireless22% VoIP
PrefixLine UsageRate CenterAssigned CarrierAssign Date
(557) 200-💻VoIPLADUEONVOY, LLC - MO08/08/2022
(557) 201-📞LandlineKIRKWOODTELEPORT COMMUNICATIONS AMERICA, LLC - MO04/14/2023
(557) 202-📞LandlineST LOUISCOMCAST IP PHONE, LLC03/27/2023
(557) 203-📱WirelessMEHLVILLET-MOBILE USA, INC.05/19/2023
(557) 204-📞LandlineST LOUISFIVE9, INC.05/22/2023
(557) 205-📞LandlineST LOUISTELEPORT COMMUNICATIONS AMERICA, LLC - MO06/01/2023
(557) 206-📞LandlineST LOUISTELEPORT COMMUNICATIONS AMERICA, LLC - MO06/01/2023
(557) 207-📞LandlineOAKVILLEFIVE9, INC.06/15/2023
(557) 208-💻VoIPLADUEONVOY, LLC - MO09/07/2023
(557) 209-💻VoIPKIRKWOODONVOY, LLC - MO02/29/2024
(557) 210-📱WirelessLADUECELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO09/21/2023
(557) 211-📞LandlineXXXXXXXXXXMULTIPLE OCN LISTINGN/A
(557) 212-📱WirelessMEHLVILLET-MOBILE USA, INC.09/29/2023
(557) 213-📱WirelessST LOUISNEW CINGULAR WIRELESS PCS, LLC - IL09/29/2023
(557) 214-📱WirelessST LOUISNEW CINGULAR WIRELESS PCS, LLC - IL11/13/2023
(557) 215-📞LandlineST LOUISCALLWORKS CORPORATION11/15/2023
(557) 216-📞LandlineST LOUISTELEPORT COMMUNICATIONS AMERICA, LLC - MO06/01/2023
(557) 217-📱WirelessSAPPINGTONNEW CINGULAR WIRELESS PCS, LLC - IL11/15/2023
(557) 218-📱WirelessLADUENEW CINGULAR WIRELESS PCS, LLC - IL12/22/2023
(557) 219-📱WirelessLADUECELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO01/18/2024
(557) 220-📱WirelessCREVECOEURNEW CINGULAR WIRELESS PCS, LLC - IL01/23/2024
(557) 221-💻VoIPMEHLVILLEONVOY, LLC - MO04/10/2024
(557) 222-📞LandlineST LOUISLEAP TELECOM, LLC05/04/2023
(557) 223-📱WirelessLADUECELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO04/10/2024
(557) 224-📞LandlineCREVECOEURTELEPORT COMMUNICATIONS AMERICA, LLC - MO12/15/2023
(557) 225-📱WirelessLADUENEW CINGULAR WIRELESS PCS, LLC - IL04/10/2024
(557) 226-💻VoIPCREVECOEURONVOY, LLC - MO06/05/2024
(557) 227-📱WirelessKIRKWOODNEW CINGULAR WIRELESS PCS, LLC - IL07/31/2024
(557) 228-📱WirelessST LOUISCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO11/25/2024
(557) 229-📱WirelessKIRKWOODNEW CINGULAR WIRELESS PCS, LLC - IL11/27/2024
(557) 230-📱WirelessSAPPINGTONNEW CINGULAR WIRELESS PCS, LLC - IL12/30/2024
(557) 231-📞LandlineST LOUISTELEPORT COMMUNICATIONS AMERICA, LLC - MO01/03/2025
(557) 232-📱WirelessLADUECELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO02/18/2025
(557) 233-📞LandlineST LOUISBOOST SUBSCRIBERCO L.L.C.02/25/2025
(557) 234-📱WirelessST LOUISNEW CINGULAR WIRELESS PCS, LLC - IL03/13/2025
(557) 235-📱WirelessKIRKWOODNEW CINGULAR WIRELESS PCS, LLC - IL03/31/2025
(557) 236-📱WirelessLADUECELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO04/24/2025
(557) 237-📱WirelessLADUENEW CINGULAR WIRELESS PCS, LLC - IL05/23/2025
(557) 238-📱WirelessKIRKWOODNEW CINGULAR WIRELESS PCS, LLC - IL06/20/2025
(557) 239-📱WirelessST LOUISCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO07/02/2025
(557) 240-📞LandlineLADUETELEPORT COMMUNICATIONS AMERICA, LLC - MO09/03/2025
(557) 241-💻VoIPLADUEONVOY, LLC - MO09/24/2025
(557) 242-💻VoIPST LOUISONVOY, LLC - MO09/24/2025
(557) 243-📱WirelessST LOUISNEW CINGULAR WIRELESS PCS, LLC - IL10/09/2025
(557) 244-📱WirelessKIRKWOODNEW CINGULAR WIRELESS PCS, LLC - IL10/23/2025
(557) 245-📞LandlineST LOUISTELEPORT COMMUNICATIONS AMERICA, LLC - MO11/12/2025
(557) 246-📞LandlineST LOUISWAVENATION, LLC12/03/2025
(557) 247-📱WirelessMEHLVILLENEW CINGULAR WIRELESS PCS, LLC - IL12/11/2025
(557) 248-📞LandlineST LOUISE. RITTER COMMUNICATIONS, LLC12/29/2025
(557) 249-💻VoIPLADUEONVOY, LLC - MO01/13/2026

Frequently Asked Questions about Area Code 557

Where is area code 557 located?

Area code 557 is located in Missouri (United States), serving cities like St. Louis, University City, Kirkwood, Maryland Heights, Webster Groves, Arnold, Creve Coeur, Ferguson, Clayton, Overland.

What timezone is area code 557?

Area code 557 operates in the Central timezone.

What state is area code 557?

Area code 557 is assigned to the state / telecom territory of Missouri.

Is area code 557 a scam or dangerous?

Area code 557 is an official geographic area code for Missouri. However, beware of robocaller spoofing.

Missouri State Area Codes

View complete directory of telephone area codes assigned to Missouri.

Explore Missouri Directory

Get a 557 Business Phone Number

How to acquire a virtual phone number or business line with area code 557 for local customer trust in Missouri.

Get 557 Business Number
🛡️ Scam & Safety Directory

Check high-risk international callback scam area codes and robocall warning databases.

Scam Area Codes 2026

Overlay & Nearby Area Codes for Missouri

Explore neighboring telecom prefixes sharing geographical boundaries with area code 557.

314
Central
Area Code 314
St. Louis, Florissant, University City, Kirkwood, Maryland Heights, Webster Groves, Arnold, Creve Coeur, Ferguson, Clayton
235
Central
Area Code 235
Columbia, Jefferson City, Cape Girardeau, Rolla, Farmington, Hannibal, Poplar Bluff, Jackson, Sikeston, Fulton
417
Central
Area Code 417
Springfield, Joplin, Nixa, Ozark, Republic, Carthage, Lebanon, Neosho, Webb City, Branson
573
Central
Area Code 573
Columbia, Jefferson City, Cape Girardeau, Rolla, Farmington, Hannibal, Poplar Bluff, Jackson, Sikeston, Fulton
636
Central
Area Code 636
O'fallon, St. Charles, St. Peters, Florissant, Wentzville, Chesterfield, Wildwood, Ballwin, Hazelwood, Lake St. Louis
660
Central
Area Code 660
Sedalia, Warrensburg, Kirksville, Washington, Marshall, Moberly, Maryville, Clinton, Chillicothe, Boonville