South region · Eastern Time
Delaware Area Codes
All 1 area code serving Delaware, the cities each one covers, and which are overlays. Delaware is served by 1 area code in the Eastern Time zone.
Last updated June 5, 2026
Full list
Every Delaware area code
Delaware is served by 1 area code in the Eastern Time zone. It is a single-code state, so seven-digit local dialing may still work in many places.
| Code | Main city | Type | Status |
|---|---|---|---|
| 302 | Wilmington | Geographic | In service |
Area codes and dialing in Delaware
Delaware is one of the few US states still covered by a single area code, 302. Because there's no overlap, many local calls can still be completed with seven digits, although dialing the full 10-digit number always works and is the safer habit. 302 serves Wilmington and the rest of the state, all in the Eastern Time zone.
If Delaware ever exhausts its supply of numbers, regulators would almost certainly add an overlay rather than split the state — the modern approach that lets everyone keep their existing number. For now, every Delaware number shares the 302 code. Learn the background in how area codes work.
Browse Delaware another way
Explore by South region, by time zone, or jump to the city index. You can also see the complete numeric list of every US area code.
Quick answers
Delaware area code FAQ
How many area codes does Delaware have?
Delaware currently has 1 area code: 302.
What is the main area code for Delaware?
The busiest metro in Delaware is served by the 302 code. Major cities include Wilmington.
Does Delaware require 10-digit dialing?
Much of the state still permits 7-digit local calls, though 10-digit dialing always works. Ten-digit dialing is the national standard.