Area code 557
Missouri, United States · 83 prefixes · 7 exchanges · 18 carriers
Largest exchanges
- St Louis36
- Ladue17
- Kirkwood12
- Crevecoeur6
- Mehlville5
- Sappington5
- Oakville2
Largest carriers
- New Cingular Wireless Pcs, LLC - Il23
- Onvoy, LLC - Mo18
- Teleport Communications America, LLC - Mo15
- Cellco Partnership dba Verizon Wireless - Mo8
- Onvoy Spectrum, LLC3
- T-mobile Usa, Inc.2
- Five9, Inc.2
- Terra Nova Telecom Inc.2
- Comcast IP Phone, LLC1
- Callworks Corporation1
Most reported 557 numbers
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