Area code 203 is the North American

North American

North American generally refers to an entity, people, group, or attribute of North America, especially of the United States and Canada together.-Culture:*North American English, a collective term used to describe American English and Canadian English...

 telephone

Telephone

The telephone , colloquially referred to as a phone, is a telecommunications device that transmits and receives sounds, usually the human voice. Telephones are a point-to-point communication system whose most basic function is to allow two people separated by large distances to talk to each other...

 area code

Telephone numbering plan

A telephone numbering plan is a type of numbering scheme used in telecommunications to allocate telephone numbers to subscribers and to route telephone calls in a telephone network. A closed numbering plan, such as found in North America, imposes a fixed total length to numbers...

that covers the southwestern part of Connecticut

Connecticut

Connecticut is a state in the New England region of the northeastern United States. It is bordered by Rhode Island to the east, Massachusetts to the north, and the state of New York to the west and the south .Connecticut is named for the Connecticut River, the major U.S. river that approximately...

. The area code stretches from its western border, along its southern coast, to beyond the city of New Haven, and ends just south of Hartford

Hartford, Connecticut

Hartford is the capital of the U.S. state of Connecticut. The seat of Hartford County until Connecticut disbanded county government in 1960, it is the second most populous city on New England's largest river, the Connecticut River. As of the 2010 Census, Hartford's population was 124,775, making...

. (The rest of Connecticut is served by the 860 area code

Area code 860

Area code 860 is a telephone area code that covers most of Connecticut, except its southwest, which use area codes 203 and 475. Area code 959, originally announced in August 1999, will overlay area code 860 when the 860 code nears exhaustion; a date for implementing the 959 area code has yet to be...

.) 203 overlays with area code 475. The area encompassed by 203 and 475 roughly corresponds to the part of Connecticut belonging to metro NYC. Prior to August 28, 1995, area code 203 encompassed all of Connecticut.

The City of Meriden is notable as the only place in Connecticut where one can call towns in both the Hartford and New Haven exchanges toll-free from a home (landline) phone.

Counties served by 203/475:

Fairfield

Fairfield County, Connecticut

Fairfield County is a county located in the southwestern corner of the U.S. state of Connecticut. The county population is 916,829 according to the 2010 Census. There are currently 1,465 people per square mile in the county. It is the most populous county in the State of Connecticut and contains...

 (except the Town of Sherman

Sherman, Connecticut

Sherman is the northernmost and least populous town of Fairfield County, Connecticut, United States. The population was 3,581 at the 2010 census. The town is named for New Haven's Founding Father, Roger Sherman....

), New Haven

New Haven County, Connecticut

New Haven County is a county located in the south central part of the U.S. state of Connecticut. As of the 2010 Census, the county population is 862,477 making it the third most populated county in Connecticut. There are 1,340 people per square mile...

, and Litchfield

Litchfield County, Connecticut

Litchfield County is a county located in the northwestern corner of the U.S. state of Connecticut. Litchfield County has the lowest population density of any county in Connecticut but is geographically the state's largest county. As of 2010 the population was 189,927...

 (the towns of Woodbury

Woodbury, Connecticut

Woodbury is a town in Litchfield County, Connecticut, United States. The population was 9,198 at the 2000 census. The town center is also designated by the U.S. Census Bureau as a census-designated place . Woodbury was founded in 1672....

, Bethlehem

Bethlehem, Connecticut

Bethlehem is a town in Litchfield County, Connecticut, United States. The population was 3,422 at the 2000 census. The town center was designated in the 2000 census as a census-designated place ....

, and a small part of Roxbury

Roxbury, Connecticut

Roxbury is a town in Litchfield County, Connecticut, United States. The population was 2,136 at the 2000 census.-History:Roxbury, whose Indian name was "Shepaug", a Mahican name signifiying "rocky water", was settled about the year 1713...

).

Cities and towns served by 203/475:

Ansonia

Ansonia, Connecticut

Ansonia is a city in New Haven County, Connecticut, United States, on the Naugatuck River, immediately north of Derby and about northwest of New Haven. The population was 19,249 at the 2010 census. The ZIP code for Ansonia is 06401. The city is serviced by the Metro North railroad...

, Beacon Falls

Beacon Falls, Connecticut

Beacon Falls is a town in New Haven County, Connecticut, United States. The population was 5,246 at the 2000 census. The population increased to 6,049 at the 2010 census. Beacon Falls is also home to the national-known Meteorologist Jim Cantore. Settlers from Derby, Connecticut settled Beacon...

, Bethany

Bethany, Connecticut

Bethany is a town in New Haven County, Connecticut, United States. The population was 5,040 at the 2000 census. Bethany was first settled in 1717 but it was not until May 1832 that Bethany separated from Woodbridge to become incorporated as a town. This slightly remote, sparsely populated,...

, Bethel

Bethel, Connecticut

Bethel is a town in Fairfield County, Connecticut, United States, about sixty miles from New York City. Its population was 18,584 at the 2010 census. The town center is defined by the U.S. Census Bureau as a census-designated place...

, Bethlehem

Bethlehem, Connecticut

Bethlehem is a town in Litchfield County, Connecticut, United States. The population was 3,422 at the 2000 census. The town center was designated in the 2000 census as a census-designated place ....

, Branford

Branford, Connecticut

-Landmarks and attractions:Branford has six historic districts that are listed on the U.S. National Register of Historic Places . These include buildings in Federal, Arts and Crafts, and Queen Anne styles of architecture...

, Bridgeport

Bridgeport, Connecticut

Bridgeport is the most populous city in the U.S. state of Connecticut. Located in Fairfield County, the city had an estimated population of 144,229 at the 2010 United States Census and is the core of the Greater Bridgeport area...

, Brookfield

Brookfield, Connecticut

Brookfield is a town located in northern Fairfield County, Connecticut, United States. The population was 16,452 at the 2010 census. First settled in 1710 by John Muirwood and several other colonial founders who bartered for the land From the Wyantenuck Nation Under the Sachem Waramaugs who lived...

, Cheshire

Cheshire, Connecticut

Cheshire is a town in New Haven County, Connecticut, United States. The population was 28,543 at the 2000 census. The center of population of Connecticut is located in Cheshire. In 2009 Cheshire was ranked 72 in Money Magazine's 100 Best Places to Live.Likewise, in 2011 Cheshire was ranked 73 in...

, Danbury

Danbury, Connecticut

Danbury is a city in northern Fairfield County, Connecticut, United States. It had population at the 2010 census of 80,893. Danbury is the fourth largest city in Fairfield County and is the seventh largest city in Connecticut....

, Darien

Darien, Connecticut

Darien is a town in Fairfield County, Connecticut, United States. A relatively small community on Connecticut's "Gold Coast", the population was 20,732 at the 2010 census. Darien was listed at #9 at CNN Money's list of "top-earning towns" in the United States as of 2011...

, Derby

Derby, Connecticut

Derby is a city in New Haven County, Connecticut, United States. The population was 12,391 at the 2000 census. With of land area, Derby is Connecticut's smallest municipality.The city has a Metro-North railroad station called Derby – Shelton.-History:...

, East Haven

East Haven, Connecticut

East Haven is a town in New Haven County, Connecticut, in the United States. As of the 2000 census, the town population was 28,189. The town is just 3 minutes from downtown New Haven...

, Easton

Easton, Connecticut

Easton is a town in Fairfield County, Connecticut, United States. The population was 7,490 at the 2010 census. Easton contains the historic district of Aspetuck....

, Fairfield

Fairfield, Connecticut

Fairfield is a town located in Fairfield County, Connecticut, United States. It is bordered by the towns of Bridgeport, Trumbull, Easton, Redding and Westport along the Gold Coast of Connecticut. As of the 2010 census, the town had a population of 59,404...

, Greenwich

Greenwich, Connecticut

Greenwich is a town in Fairfield County, Connecticut, United States. As of the 2010 census, the town had a total population of 61,171. It is home to many hedge funds and other financial service companies. Greenwich is the southernmost and westernmost municipality in Connecticut and is 38+ minutes ...

, Guilford

Guilford, Connecticut

Guilford is a town in New Haven County, Connecticut, United States, that borders Madison, Branford, North Branford and Durham, and is situated on I-95 and the coast. The population was 21,398 at the 2000 census...

, Hamden

Hamden, Connecticut

Hamden is a town in New Haven County, Connecticut, United States. The town's nickname is "The Land of the Sleeping Giant." Hamden is home to Quinnipiac University. The population was 58,180 according to the Census Bureau's 2005 estimates...

, Madison

Madison, Connecticut

Madison is a town in the southeastern corner of New Haven County, Connecticut, occupying a central location on Connecticut's Long Island Sound shoreline. The population was 18,812 at the 2000 census....

, Meriden

Meriden, Connecticut

Meriden is a city in New Haven County, Connecticut, United States. According to 2005 Census Bureau estimates, the population of the city is 59,653.-History:...

, Middlebury

Middlebury, Connecticut

Middlebury is a town in New Haven County, Connecticut, United States. The population was 6,451 at the 2000 census.-Geography:According to the United States Census Bureau, the town has a total area of , of which, of it is land and of it is water....

, Milford

Milford, Connecticut

Milford is a coastal city in southwestern New Haven County, Connecticut, United States, located between Bridgeport and New Haven. The population was 52,759 at the 2010 census...

, Monroe

Monroe, Connecticut

Monroe is a town in Fairfield County, Connecticut, United States. The population was 19,479 at the 2010 census. The current first selectman is Steve Vavrek....

, Naugatuck

Naugatuck, Connecticut

Naugatuck is a consolidated borough and town in New Haven County, Connecticut, United States. The town spans both sides of the Naugatuck River just south of Waterbury, and includes the communities of Union City on the east side of the river, which has its own post office, Straitsville on the...

, New Canaan

New Canaan, Connecticut

New Canaan is a town in Fairfield County, Connecticut, United States, northeast of Stamford, on the Fivemile River. The population was 19,738 according to the 2010 census.The town is one of the most affluent communities in the United States...

, New Fairfield

New Fairfield, Connecticut

New Fairfield is a town in Fairfield County, Connecticut, United States. The population was 13,881 at the 2010 census. The town is considered part of the greater New York Metropolitan Area and lies approximately from New York City...

, New Haven

New Haven, Connecticut

New Haven is the second-largest city in Connecticut and the sixth-largest in New England. According to the 2010 Census, New Haven's population increased by 5.0% between 2000 and 2010, a rate higher than that of the State of Connecticut, and higher than that of the state's five largest cities, and...

, Newtown

Newtown, Connecticut

Newtown is a town in Fairfield County, Connecticut, United States. The population was 27,560 at the 2010 census. Newtown was founded in 1705 and incorporated in 1711.-Government:...

, North Branford

North Branford, Connecticut

North Branford is a town in New Haven County, Connecticut, United States. The population was 13,906 at the 2000 census.-Geography:According to the United States Census Bureau, the town has a total area of 26.6 square miles , of which 24.9 square miles is land and 1.7 square miles is water...

, North Haven

North Haven, Connecticut

North Haven is a town in New Haven County, Connecticut on the outskirts of New Haven, Connecticut.North Haven is less than ten miles from downtown New Haven and Yale University. It is near Sleeping Giant State Park and home the Quinnipiac University School of Health Sciences, the School of Nursing,...

, Norwalk

Norwalk, Connecticut

Norwalk is a city in Fairfield County, Connecticut, United States. According to the 2010 U.S. Census, the population of the city is 85,603, making Norwalk sixth in population in Connecticut, and third in Fairfield County...

, Orange

Orange, Connecticut

Orange is a town in New Haven County, Connecticut, United States. The population was 13,233 at the 2000 census. A 2007 Census Bureau estimate puts the population at 13,813. The town is governed by a Board of Selectmen.-History:...

, Oxford

Oxford, Connecticut

Oxford is a town located in western New Haven County, Connecticut, United States. The population was 12,272 at the 2010 Census. There are several areas in Oxford: Quaker Farms, Riverside and Oxford Center. Oxford belongs to the Naugatuck Valley Economic Development Region and the Central...

, Prospect

Prospect, Connecticut

Prospect is a town in New Haven County, Connecticut, United States. The population was 8,707 at the 2000 census.-Geography:According to the United States Census Bureau, the town has a total area of , of which, of it is land and of it is water...

, Redding

Redding, Connecticut

Mark Twain, a resident of the town in his old age, contributed the first books for a public library which was eventually named after him.-Government:...

, Ridgefield

Ridgefield, Connecticut

Ridgefield is a town in Fairfield County, Connecticut, United States. Situated in the foothills of the Berkshire Mountains, the 300-year-old community had a population of 24,638 at the 2010 census. The town center, which was formerly a borough, is defined by the U.S...

, Roxbury

Roxbury, Connecticut

Roxbury is a town in Litchfield County, Connecticut, United States. The population was 2,136 at the 2000 census.-History:Roxbury, whose Indian name was "Shepaug", a Mahican name signifiying "rocky water", was settled about the year 1713...

, Seymour

Seymour, Connecticut

Seymour is a town located in western New Haven County, Connecticut, United States. The town was named for Governor Thomas H. Seymour. The population was 15,454 at the 2000 census.-Geography:...

, Shelton

Shelton, Connecticut

Shelton is a city in Fairfield County, Connecticut, United States. The population was 39,559 at the 2010 census.-Origins:Shelton was settled by the English as part of the town of Stratford, Connecticut, in 1639...

, Southbury

Southbury, Connecticut

Southbury is a town located in western New Haven County, Connecticut, USA. Southbury is located north of Oxford and Newtown; it also is east of Brookfield. Southbury's population was 18,567 at the 2000 census....

, Stamford

Stamford, Connecticut

Stamford is a city in Fairfield County, Connecticut, United States. According to the 2010 census, the population of the city is 122,643, making it the fourth largest city in the state and the eighth largest city in New England...

, Stratford

Stratford, Connecticut

Stratford is a town in Fairfield County, Connecticut, United States, located on Long Island Sound at the mouth of the Housatonic River. It was founded by Puritans in 1639....

, Trumbull

Trumbull, Connecticut

Trumbull, a town in Fairfield County, Connecticut in the New England region of the United States, is bordered by the towns of Monroe, Shelton, Stratford, Bridgeport, Fairfield and Easton along Connecticut's Gold Coast. The population was 36,018 according to the 2010 census.Family Circle magazine...

, Wallingford

Wallingford, Connecticut

Wallingford is a town in New Haven County, Connecticut, United States. The population was 43,026 at the 2000 census.- History :Wallingford was established on October 10, 1667, when the Connecticut General Assembly authorized the "making of a village on the east river" to 38 planters and freemen...

, Waterbury

Waterbury, Connecticut

Waterbury is a city in New Haven County, Connecticut, on the Naugatuck River, 33 miles southwest of Hartford and 77 miles northeast of New York City...

, West Haven

West Haven, Connecticut

West Haven is a city in New Haven County, Connecticut, United States. According to 2006 Census Bureau estimates, the population of the city is 52,721.-History:...

, Weston

Weston, Connecticut

Weston is a town in Fairfield County, Connecticut. The population was 10,179 at the 2010 census. The town is served by Route 57 and Route 53, both of which run through the town center. About 19% of the town's workforce commutes to New York City, about to the southwest.Like many towns in...

, Westport

Westport, Connecticut

-Neighborhoods:* Saugatuck – around the Westport railroad station near the southwestern corner of the town – a built-up area with some restaurants, stores and offices....

, Wilton

Wilton, Connecticut

Wilton is a town nestled in the Norwalk River Valley in southwestern Connecticut in the United States. It is located in Fairfield County. As of the 2010 census, the town population was 18,062. In 2007, it was voted as one of CNN Money's "Best Places to Live" in the United States.Located along...

, Wolcott

Wolcott, Connecticut

Wolcott is a town in New Haven County, Connecticut, United States. The population was 15,215 at the 2000 census.Wolcott was founded in 1796 and was originally named Farmingbury...

, Woodbridge

Woodbridge, Connecticut

Woodbridge is a town in New Haven County, Connecticut, United States. The population was 8,983 at the 2000 census. It is one of the wealthiest towns in Connecticut, ranking 16th in the state in terms of per capita income, and is home to many of the faculty of Yale University...

, Woodbury

Woodbury, Connecticut

Woodbury is a town in Litchfield County, Connecticut, United States. The population was 9,198 at the 2000 census. The town center is also designated by the U.S. Census Bureau as a census-designated place . Woodbury was founded in 1672....

Area code overlay

The Connecticut Department of Public Utility Control, in August 1999, proposed an area code overlay for the 203 area code. Area code 475 went into effect on December 12, 2009. Even though area code 475 overlays only 203, all callers in Connecticut (including those in area code 860) had to dial all calls with ten digits, effective November 14, 2009 ; this is because when needed, an overlay of area code 959 on area code 860

Area code 860

Area code 860 is a telephone area code that covers most of Connecticut, except its southwest, which use area codes 203 and 475. Area code 959, originally announced in August 1999, will overlay area code 860 when the 860 code nears exhaustion; a date for implementing the 959 area code has yet to be...

 will be implemented.

The first range of available numbers in Connecticut's third area code was (475) 882-4xxx, in the Huntington section of Shelton

Shelton, Connecticut

Shelton is a city in Fairfield County, Connecticut, United States. The population was 39,559 at the 2010 census.-Origins:Shelton was settled by the English as part of the town of Stratford, Connecticut, in 1639...

.

External links

• List of exchanges from AreaCodeDownload.com, 203 Area Code