203 Area Code

Area Code	203
State	Connecticut
Country	United State
Code Type	General Purpose Code
In Service	Yes
Timezone	Eastern Standard Time (EST)
Overlay Complex	203/475
Assignment Date	01-JAN-47
In Service Date	01-JAN-47
Area Code	203

What is the 203 Area Code?

Area code 203 is located in Connecticut, within United State, serving the region's residents and businesses. The 203 area code was first assigned in 01-JAN-47 and has been in service since 01-JAN-47.

The 203 area code is part of an overlay complex, which includes the area codes 203/475. These codes all serve the same geographic region.

Cities in Area Code 203

Area codes of Connecticut

Further Details on the 203 Area Code

Where is the 203 Area Code Located?

Area code 203 serves the entire state of Connecticut in United State, providing phone services to both residential and business users. It covers urban, suburban, and rural areas alike, ensuring reliable communication across the region.

What time zone is area code 203 in?

Area code 203 is located in the Eastern Standard Time (EST) time zone. This designation indicates the predominant time zone for calls made within this area code.

When was area code 203 assigned and put into service?

Area code 203 was officially assigned on 01-JAN-47, signifying its designation for use in telecommunications, and it became operational on 01-JAN-47, allowing callers to begin using this area code for their dialing needs.

Is the 203 Area Code Still Active?

Yes, the 302 area code is still active and in service. It is the primary area code for all landline and mobile phones registered in Delaware. There are no overlay codes currently in place for the state.

What are the dialing requirements for making calls with area code 203?

For local calls within area code 203, the required dialing pattern is 10D. For toll calls, you'll need to dial 1+10D , where "D" indicates the number of digits to dial. When calling foreign NPAs from area code 203, local calls require 10D, and toll calls use 1+10D.

Data Sources: NANPA Area Code, U.S. Area Code Map