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603 Area Code: Location, Time Zone & Phone Lookup

(603)
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What Does Area Code 603 Mean?

Area code 603 covers the entire state of New Hampshire. It is the only area code that serves the area.

Major Cities in 603 Area Code

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The Details of Area Code 603

603 is a telephone area code in the northeastern United States. It is the only area code in New Hampshire.The 603 code was created on January 1, 1992, as a split from the 603 area code. At the time, it covered the northern two-thirds of the state. The southern third was in the 609 area code.

In 1997, the 603 code was split again, with the southern half getting the new 603 code and the northern half keeping 603. This was done to evenly distribute the three-digit codes across the state.

Today, 603 is the only area code in New Hampshire. It covers the entire state, with the exception of a small portion of the southeastern corner that is in the 470 area code.

What Time Zone Is Area Code 603 Located In?

The area code 603 is located in the Eastern Standard Time Zone. This zone is five hours behind Coordinated Universal Time (UTC). The Eastern Standard Time Zone covers the states of Maine, New Hampshire, and Vermont.

Phone Number Prefixes In The 603 Area Code