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area code

Biggest city:

New Haven




Eastern (GMT -5)

Nearby area codes: 

Zip codes



Major Cities:

Bridgeport, New Haven, Stamford, Waterbury, Norwalk​

New Haven

Average Income:





Unemployment Rate:

The 203 area code, serving southwestern Connecticut, has a rich history and continues to play a significant role in the region's telecommunications network. Historical Significance: The 203 area code has a historical legacy, being one of the original North American area codes established in 1947. It initially covered the entire state of Connecticut, underscoring its importance in the early days of telephone communication in the region. Geographical Evolution: Over time, as Connecticut's population and telecommunications needs grew, the 203 area code underwent changes to accommodate these demands. The most significant change occurred in 1995 when the area code was split, giving rise to the 860 area code to serve other parts of the state. This division marked a significant shift in the area code's coverage, focusing primarily on southwestern Connecticut, including cities like Bridgeport, Stamford, and New Haven. Continued Area Code Relief: Despite the split in 1995, the 203 area code has continued to face challenges related to numbering resource exhaustion. To address this issue, area code relief measures have been considered, such as introducing overlay area codes or implementing number conservation practices to ensure a sufficient supply of phone numbers for the region's growing population and businesses. In conclusion, the 203 area code's historical significance, geographical evolution, and ongoing efforts to manage numbering resources reflect its enduring role in connecting communities and businesses in southwestern Connecticut. It remains an essential part of the region's telecommunications landscape.
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