This is a list of area codes in Connecticut: *

203 Year 203 ( CCIII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Plautianus and Geta (or, less frequently, year 956 ''Ab urbe condit ...

– Covering southwestern Connecticut ( Fairfield County (except for

Sherman Sherman most commonly refers to: *Sherman (name), a surname and given name (and list of persons with the name) ** William Tecumseh Sherman (1820–1891), American Civil War General *M4 Sherman, a tank Sherman may also refer to: Places United St ...

);

New Haven County New Haven County is a county in the south central part of the U.S. state of Connecticut. As of the 2020 census, the population was 864,835, making it the third-most populous county in Connecticut. Two of the state's top 5 largest cities, New ...

, and the towns of Bethlehem,

Woodbury Woodbury may refer to: Geography Antarctica *Woodbury Glacier, a glacier on Graham Land, British Antarctic Territory Australia * Woodbury, Tasmania, a locality in Australia England * Woodbury, Bournemouth, an area in Dorset *Woodbury, East Devo ...

, as well as a small part of

Roxbury Roxbury may refer to: Places ;Canada * Roxbury, Nova Scotia * Roxbury, Prince Edward Island ;United States * Roxbury, Connecticut * Roxbury, Kansas * Roxbury, Maine * Roxbury, Boston, a municipality that was later integrated into the city of Bosto ...

Litchfield County Litchfield County is in northwestern Connecticut. As of the 2020 census, the population was 185,186. The county was named after Lichfield, in England. Litchfield County has the lowest population density of any county in Connecticut and is the ...

); one of the original area codes enacted in 1947 *

475 __NOTOC__ Year 475 (Roman numerals, CDLXXV) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Zeno without colleague (or, less freque ...

– Overlay of 203 (December 2009) *

860 __NOTOC__ Year 860 ( DCCCLX) was a leap year starting on Monday (link will display the full calendar) of the Julian calendar. Events By place Byzantine Empire * June 18 – Byzantine–Rus' War: A fleet of about 200 Rus' vessel ...

– Northern and southeastern Connecticut (split from 203 in August 1995) * 959 – Overlay of 860 (August 2014) In 1999, Connecticut announced that two additional codes may be implemented when needed:

, overlaying 203; and 959, overlaying 860. In March 2009, NANPA announced area code 475 to overlay 203 in December 2009. Effective November 14, 2009, all calls originating from area code 203 or 860 must be dialed with 10 digits beginning with the area code, including calls within the same area code, with long distance and 976 calls requiring to dial 1 first.

References

{{Area code list Connecticut

Area codes A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are the addresses of participants in a telephone network, rea ...