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Stamford, CT Area Codes

Stamford, Connecticut (population 139,535) uses area codes 203 and 475.

Area code203
Area code475
Time zoneEastern
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Stamford and nearby cities in area code 203

Carriers with Stamford numbers

124 prefixes are assigned to the Stamford exchange: 27% mobile, 26% VoIP and cable, 48% landline.

CarrierPrefixes
Frontier49
Verizon Wireless17
AT&T Mobility10
Verizon Business (MCImetro)9
Cablevision Lightpath7
Lumen (Level 3)7
T-Mobile6
Onvoy (Sinch)5

Area codes used in Stamford

Area codePrefixes serving StamfordMain carriers in this code
20397Frontier, Verizon Wireless, AT&T Mobility
47527Onvoy (Sinch), Verizon Wireless, T-Mobile

Stamford phone number prefixes

Numbers starting with these first six digits were originally assigned to the Stamford exchange.

Nearby cities in area code 203

Questions

What is the area code for Stamford, CT?
Stamford uses 2 area codes: 203 and 475. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
What time zone is Stamford in?
Stamford is in the Eastern time zone.