Look up Area Codes of the United States

The United States has 335 area codes, including 18 non-geographic and 317 geographic codes, covering all 50 states, the District of Columbia, and US territories like Puerto Rico, the US Virgin Islands, and Guam. The number of area codes in each region varies based on population and demand for phone numbers. States like California, Texas, and Florida have many area codes, while Wyoming, Vermont, and North Dakota have just one or two. With increasing demand due to mobile phones and internet telephony, more area codes may be added to accommodate growth and technological advances.

What is the area code?
An area code is a three-digit number that precedes the local phone number and designates a specific geographic region within a country. In the United States, area codes are part of the North American Numbering Plan (NANP) and help organize and route phone calls efficiently.
How is the area code assigned?
Area codes are assigned by the North American Numbering Plan Administrator (NANPA). They are allocated based on the needs of a region, considering factors like population growth and the demand for new phone numbers. Geographic area codes cover specific regions, while non-geographic area codes are used for special services.
What is an overlay area code?
An overlay area code is a new area code that covers the same geographic region as an existing area code. It is introduced to provide additional phone numbers when the existing area code runs out of available numbers. In areas with overlay codes, ten-digit dialing (area code + local number) is required for all calls.
How to make an international long-distance call?
To make an international long-distance call, dial the international access code (usually "011" in the United States), followed by the country code, the area code (if applicable), and the local phone number. For example, to call a number in the UK, you would dial 011 + 44 + area code + local number.
How to avoid dialing the wrong area code?
To avoid dialing the wrong area code, always double-check the phone number you are dialing, especially when calling unfamiliar or distant locations. Save frequently dialed numbers in your phone with the correct area codes, and consider using contact management features or a phone directory app to ensure accuracy.
How do I know the time zone of a certain area code?
To determine the time zone of a specific area code, you can use online tools or directories that provide this information. Many websites and apps offer area code lookup services that include time zone details. Additionally, you can often find this information on the website of the phone service provider or through a quick internet search.