The area code 603 is located in Dover, New Hampshire.
Area code 603 serves Dover, New Hampshire, along with other parts of the state. Established in 1947, it covers major cities like:
Dover, known for its vibrant downtown and historic sites, is the oldest continuously inhabited European settlement in New Hampshire. Fun fact: the region is home to the Bellamy River, which played a vital role in the area's colonial economy. Let the area code 603 guide you through the charming landscapes and rich history of New Hampshire!