Area code 603 serves the entire state of New Hampshire, from Manchester to the White Mountains. It’s one of the original 86 area codes from 1947 and remains unchanged. The state is known for its small-town charm, natural beauty, and “Live Free or Die” spirit. Outdoor recreation, quaint towns, and history thrive here.
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- Select a number: Visit the page for your desired area code and choose a number from the list.
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Cities of Area Code 603
Description of the cities in area code 603
About Derry
Derry is a vibrant city located in the NH area, home to approximately 22,015 residents.
Geographically, it lies at a latitude of 42.88064 and a longitude of -71.32729 , with an elevation of 84 meters above sea level.
The city spans from 42.924257 N to 42.855211 S and stretches east to -71.216273 and west to -71.340015.
Learn more about Derry on Wikipedia
About Dover
Dover is a vibrant city located in the NH area, home to approximately 30,880 residents.
Geographically, it lies at a latitude of 43.19786 and a longitude of -70.87367 , with an elevation of 19 meters above sea level.
The city spans from 43.25495 N to 43.117638 S and stretches east to -70.819022 and west to -70.961528.
Learn more about Dover on Wikipedia
About East Concord
East Concord is a vibrant city located in the NH area, home to approximately 43,976 residents.
Geographically, it lies at a latitude of 43.20814 and a longitude of -71.53757 , with an elevation of 83 meters above sea level.
The city spans from 43.309816 N to 43.151787 S and stretches east to -71.456501 and west to -71.66871.
Learn more about East Concord on Wikipedia
About Keene
Keene is a vibrant city located in the NH area, home to approximately 23,265 residents.
Geographically, it lies at a latitude of 42.93369 and a longitude of -72.27814 , with an elevation of 148 meters above sea level.
The city spans from 42.999945 N to 42.904271 S and stretches east to -72.21693 and west to -72.382744.
Learn more about Keene on Wikipedia
About Manchester
Manchester is a vibrant city located in the NH area, home to approximately 110,229 residents.
Geographically, it lies at a latitude of 42.99564 and a longitude of -71.45479 , with an elevation of 80 meters above sea level.
The city spans from 43.051474 N to 42.889586 S and stretches east to -71.375409 and west to -71.512713.
Learn more about Manchester on Wikipedia
About Nashua
Nashua is a vibrant city located in the NH area, home to approximately 87,970 residents.
Geographically, it lies at a latitude of 42.76537 and a longitude of -71.46757 , with an elevation of 49 meters above sea level.
The city spans from 42.805874 N to 42.700048 S and stretches east to -71.432336 and west to -71.561414.
Learn more about Nashua on Wikipedia
About Portsmouth
Portsmouth is a vibrant city located in the NH area, home to approximately 21,530 residents.
Geographically, it lies at a latitude of 43.07704 and a longitude of -70.75766 , with an elevation of 6 meters above sea level.
The city spans from 43.099634 N to 43.013505 S and stretches east to -70.727971 and west to -70.823097.
Learn more about Portsmouth on Wikipedia
About Rochester
Rochester is a vibrant city located in the NH area, home to approximately 30,038 residents.
Geographically, it lies at a latitude of 43.30453 and a longitude of -70.97562 , with an elevation of 70 meters above sea level.
The city spans from 43.379205 N to 43.225782 S and stretches east to -70.896317 and west to -71.072708.
Learn more about Rochester on Wikipedia
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