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Phone Lookup For Area Code 203

What is the 203 area code?

State Connecticut
Time Zone Eastern Time

The 203 area code is located in the state of Connecticut, and according to Intelius data, covers roughly 2,899,500 phone numbers. Stamford is the largest city within this area code with a population of about 623,690.

Have you received a call from a number with a 203 area code? Figure out who is calling you by performing a reverse phone lookup search. Intelius can provide you with a phone report that includes (when available) original line type and carrier, the number owner’s name, last known address and past addresses, age, possible relatives, and more.

Read our blog for more information about area codes!

Top cities in the (203) area code

  1. Stamford
    County Western Connecticut
    Population 623,690
  2. New Haven
    County South Central Connecticut
    Population 573,244
  3. Middletown
    County Naugatuck Valley
    Population 454,083
  4. Hartford
    County Greater Bridgeport
    Population 327,286

203 Stats

Number of Prefixes
778
Number of Cellphones
1,730,200
Number of Land Lines
1,169,300

Area Code (203) Prefixes

Prefix
COUNTY
City
CARRIER
TYPE
County South Central Connecticut
City Hamden
Carrier Frontier
Type Landline
County Western Connecticut
City Hartford Main
Carrier USA Mobility
Type Paging
County South Central Connecticut
City Norwalk Main
Carrier Verizon Business
Type Landline
County South Central Connecticut
City Wallingford
Carrier Frontier
Type Landline
County South Central Connecticut
City Stamford
Carrier T-Mobile
Type Landline
County Western Connecticut
City Stamford
Carrier Windstream
Type VoIP
County South Central Connecticut
City Hamden
Carrier Frontier
Type Landline
County South Central Connecticut
City Hamden
Carrier Frontier
Type Landline
County Western Connecticut
City Hartford Main
Carrier USA Mobility
Type Paging
County Greater Bridgeport
City Stamford
Carrier Verizon Business
Type Wireless, PCS, Cellular