- This area code is shared by 8 main cities
Derry (NH)
Dover (NH)
East Concord (NH)
Keene (NH)
Manchester (NH)
Nashua (NH)
Portsmouth (NH)
Rochester (NH)
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New Hampshire, located in the New England region of the United States, is served by a single area code: 603. Established in 1947 as one of the original area codes, 603 has remained unchanged in its geographical coverage, making it one of the few states in the country with a single area code for its entirety. This consistency reflects the state’s relatively small population, which, as of the 2020 census, was approximately 1.36 million residents.
The area code 603 encompasses all parts of New Hampshire, accommodating a mixture of urban and rural communities. The largest city in the state is Manchester, which serves as a key economic and cultural hub. Other significant towns include Nashua, Concord (the state capital), and Portsmouth. Due to its size and population density, New Hampshire has not required the introduction of additional area codes, a rarity in an era where many states are experiencing number exhaustion due to the proliferation of mobile devices and VoIP services.
Telecommunications in New Hampshire exhibit unique characteristics, influenced by the state’s geography and demographic distribution. The predominance of landlines in rural areas contrasts with a growing trend of mobile phone usage in urban locales. The state's telecommunications infrastructure continues to adapt, supporting both traditional and modern communication methods while maintaining the historical significance of its singular area code.
Derry (NH)
Dover (NH)
East Concord (NH)
Keene (NH)
Manchester (NH)
Nashua (NH)
Portsmouth (NH)
Rochester (NH)
| Main Cities in New Hampshire |
|---|
Derry (NH) |
Dover (NH) |
East Concord (NH) |
Manchester (NH) |
Nashua (NH) |
Portsmouth (NH) |
Rochester (NH) |
New Hampshire has 1 area codes (603). These area codes are split between cities or states, so if you want to call to New Hampshire, you need to know exactly where you would like to call.
The first 3 digits to call New Hampshire may vary depending on where you want to call to, being one or the other depending on the region or city. Take a look at our listing above to find out which area code you need.
Calling New Hampshire from another state in the United States is considered a long-distance call. Here’s how to make the call: First, dial the area code for New Hampshire. Each state, and sometimes specific cities within a state, has unique area codes. Then, enter the 7-digit phone number of the person or business you’re trying to reach. If you’re calling from a landline, check with your provider, as long-distance charges may apply. However, most mobile carriers in the U.S. offer nationwide calling without additional fees. Alternatively, you can use VoIP or internet-based calling apps, like Skype, Zoom, or WhatsApp, to bypass traditional long-distance charges. The number you want to reach should look like this: 1-(AreaCode)-111-2222.
When making calls within the United States, dialing +1 depends on several factors. On most modern mobile phones, carriers automatically recognize the country code when calling within the U.S., so dialing +1 is usually not required; you can simply enter the area code followed by the phone number, such as 213-555-1234. If you’re using a landline, dialing 1 (the U.S. country code) before the area code and phone number is often necessary for long-distance calls; for example, calling from one state to another may require dialing 1-213-555-1234. When calling the U.S. from another country, dialing +1 is necessary, so a call from abroad would be formatted as +1-213-555-1234. VoIP and internet-based calling platforms, like Skype and WhatsApp, generally handle country codes automatically, making it unnecessary to dial +1 manually for U.S. numbers.
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