|General Information for Area Code 203|
|Major City||New Haven|
|Time Zone||Eastern (UTC-05:00)|
|Prefix||Primary City||County||Phone Type|
|203-997||Derby, CT||New Haven||Cell Number|
|203-999||New Haven, CT||New Haven||Cell Number|
|203-555||New Haven, CT||Used in movie||Cell Number|
Area code is a type of numbering scheme used in telecommunication. It divides the territories of its member countries, the code is a three-digit code. The digits 0 and 1 applied for central office codes. Other digits were applied into geographic areas of the service territory.
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