Area code · CT
203 area code
The 203 area code serves New Haven, Connecticut. Look up a specific 203 number, or browse other popular area codes.
2 min readUpdated October 6, 2026By the SecondBars team
Location
New Haven, CT
Timezone
Eastern
State
Connecticut
Major cities
New Haven, Bridgeport, Stamford
ABOUTAbout the 203 area code
The 203 area code is assigned to New Haven, Connecticut. Phone numbers with this area code are used by residents and businesses in the New Haven metropolitan area and surrounding communities.
If you've received an unwanted call from a 203 area code number, use the phone lookup to see what we have on file for it. Don't call back numbers you don't recognize or share personal details, and block numbers that keep calling.
EXPLOREPopular area codes
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