Delaware Area Codes
Complete directory of all 1 active area codes serving Delaware. The The First State has a population of 1,031,890 (2023 estimate) and uses 1 area code.
About Area Codes in Delaware
Delaware (DE) is the The First State, located in the South region of the United States. With a 2023 population of 1,031,890 residents, Delaware is served by 1 active area code. The state capital is Dover and the largest city is Wilmington.Delaware's official motto is "Liberty and Independence."
Area code assignments in Delaware follow the North American Numbering Plan (NANP), which has been in effect since 1947. As the state's population and demand for phone numbers grew — driven by the rise of cell phones, fax machines, pagers, and VoIP lines — regulators either split existing area codes geographically or added overlay codes that share the same territory. That's why Delaware now has 1 codes: 302.
When you receive a call from a Delaware number, the area code tells you only where the number was originally assigned. Because of Local Number Portability (LNP), which took effect in 2003, callers can keep their phone numbers even when moving across state lines. So while a 302 number was once assigned in Delaware, the person calling you could be anywhere in the US today.
Time zones in Delaware
Delaware observes the Eastern time zone. Daylight Saving Time is observed from the second Sunday in March through the first Sunday in November, when clocks shift forward by one hour. When you call a Delaware number from outside the state, double-check the local time above each area code detail page to avoid calling at unreasonable hours.
Phone number format in Delaware
All Delaware phone numbers follow the standard 10-digit NANP format: (NPA) NXX-XXXX. For local calls within Delaware, you typically need to dial the full 10-digit number — even for calls within the same area code — because of mandatory 10-digit dialing imposed by the FCC for areas with overlay codes (most of Delaware's territory). For long-distance calls within the NANP, dial 1 + area code + 7-digit number.
Frequently asked questions about Delaware area codes
How many area codes does Delaware have?
Delaware currently has 1 active area code: 302.
What is Delaware's original area code?
The oldest area code(s) in Delaware were assigned in 1947 as part of the original 86 NANP codes. These legacy codes typically covered the entire state at first, then were split as demand grew.
What time zone is Delaware in?
Delaware is in the Eastern time zone.
Will Delaware get more area codes?
As Delaware's population and number demand grow, NANPA may assign additional overlay codes. When the current codes run out of available prefixes, regulators announce public hearings and propose new codes. The AreaCodeCentral team tracks these announcements and updates the directory within 24 hours of any new code activation.