Located in the Eastern (GMT -05:00) time zone. Area code 203 serves the state of Connecticut. This area code was assigned on January 1st, 1947. On January 1st, 1947 it went into service. 203 is a General Purpose Code. 203 service area does overlap with 475 area codes. Dialing pattern for local calls within the same NPA (area code) is 10D.
Information for Area Code 203
Area Code
203
Country
United States
State
Connecticut (CT)
Major City
Bridgeport
Time Zone
Eastern (GMT -05:00)
Population
1,664,818
White Population
1,314,773
Black Population
181,040
Hispanic Population
186,838
Asian Population
46,897
Hawaiian Population
648
Indian Population
3,766
Other Population
78,365
Male Population
802,460
Female Population
862,358
Avg House Value
$253,285.05
Avg Household Income
$67,484.27
Avg Persons Per Household
2.61
Median Age
37.62
Median Age (Male)
36.60
Median Age (Female)
38.61
List of Cities in Area Code Overlay Complex 270
New Haven
Ansonia
Danbury
Naugatuck
Stamford
Bridgeport
Waterbury
Cos Cob
Wallingford
Guilford
Wolcott
Cheshire
Shelton
Norwalk
Meriden
Milford
Old Greenwich
Madison
Wilton
Greenwich
Fairfield
Darien
Branford
Trumbull
Hamden
Redding
Oxford
New Canaan
Ridgefield
Westport
Newtown
Southbury
Woodbury
Riverside
Weston
North Branford
List of Zip Codes in Area Code 203
6519
6510
6511
6820
6437
6812
6810
6811
6702
6708
6710
6405
6608
6604
6607
6897
6451
6450
6880
6910
6902
6901
6611
6484
6851
6850
6855
6514
6518
6517
6418
6401
6877
6443
6854
6410
6825
6824
6488
6798
6492
6470
6906
6870
6460
6605
6830
6831
6807
6840
6905
6907
6610
6606
6515
6524
6525
6896
6716
6478
6483
6513
6512
6516
6471
6472
6473
6770
6883
6712
6706
6705
6878
6461
6853
SPs and Telephone companies in Area Code 270
Teleport Communications America, Llc - Ct
Southern New England Telco Dba Frontier Comm Of Ct