New Hampshire Area Code – Code List & Maps

New Hampshire is Officially using 1 New Hampshire Area Codes. None Of Them Are Overlay Codes. New Hampshire officially has one area code 603 Which Covers The Entire State, when the numbering system was established in 1947. Today Area Code 603 Is the Most Populated Areas with 1.9 million of the state 2.0 million residents.

New Hampshire Area Code

New Hampshire officially Using 1 Area Code Which Is –

Cities Which Are Covered by Area Code –

Area Code 603:- Which Covers All The Entire State.

History And Changes In New Hampshire Area Code

On 01/01/1947 – Area code 603 was set into service Which Covers The Entire States.

New Hampshire Area Code

What Is Area Code?

Area code is a three-digit code in which US and other countries are divided. It is Also a local telephone dialing code where They Call each other With These Codes.

Why are area codes added?

When The Current Area Codes Expires Or Increase in the use of cellular phones, modems, and Internet access It Creates Problems. So That why Area Codes Are Added And each area code has a potential capacity of about 8 million unique phone numbers


Once The new Area Codes Rae assigned there is usually a 6 Months Period To Move. At that time Customers Are Encouraged To Use The Code But Seven Digit Dialling is Allowed. After 6 Months customers are required to use the new telephone no.

Other Area Codes

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