The Delaware area code
Every active code: tap any card for its full guide, who called, cities and ZIPs, map, spam patterns and local time.
Got a call from a Delaware number you don’t recognize?Open that code’s guide above for its full prefix lookup. AT&T ActiveArmor® blocks spam automatically, included with AT&T wireless plans.
- Fraud calls blocked automatically on the network
- Suspected spam labeled before you answer
- Caller ID & custom call blocking in the free app
- Reverse number lookup
- Identity monitoring & identity theft insurance
Included with AT&T wireless plans. Requires compatible device/service and download of the AT&T ActiveArmor® app. Other terms & restrictions apply. May not detect all threats and may block wanted calls. Some features require Advanced mobile security ($7/mo.). See terms.
See how ActiveArmor® worksIncluded with the free 30-day AT&T Wireless℠ trial- 100GB of data plus 25GB hotspot
- Unlimited talk & text within the U.S.
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See offer details
Service good for 30 days. Data: Limited to 100GB of data and 25GB of hotspot data. No additional data is available after limit is reached. Video is limited to SD quality. Talk & Text: Includes unlimited talk & text within the U.S. and unlimited text from the U.S. to over 230 countries. Limits: One trial per user. An unlocked, GSM-compatible iOS or Android phone with eSIM capability is required. You’ll receive a trial phone number that belongs to AT&T and is not available to be ported to another carrier or otherwise retained. Trial plan features and details may differ from or be unavailable in other AT&T plans. U.S. only. All terms subject to change at any time.
Delaware area codes by city
The largest Delaware communities and the area code that serve them. Every city links to its local AT&T internet page.
| City | Area code(s) |
|---|---|
| Wilmington | 302 |
| Newark | 302 |
| Dover | 302 |
| Bear | 302 |
| Georgetown | 302 |
| Middletown | 302 |
| Milford | 302 |
| Millsboro | 302 |
| Millville | 302 |
| New Castle | 302 |
| Rehoboth Beach | 302 |
| Seaford | 302 |
How Delaware got its codes
Every Delaware area code, in the order it entered service. Splits carved new regions; added codes overlay existing ones, which is why ten-digit dialing is standard.
| In service | Code | How it arrived |
|---|---|---|
| 1947 | 302 | One of the original area codes of 1947 |
Source: NANPA NPA database, July 2026. Regenerated monthly.
Delaware area code map
One code covers all of Delaware. Click or tap the map to open its full guide.
How Delaware’s codes work
How Delaware works
302 is the whole map: every county in Delaware, one code.
One code, statewide
Every local number in Delaware starts with 302. From out of state, dial 1 302 and the seven-digit number.
Reading the map
The whole state is one territory. Click or tap the map to open the 302 guide.
Every code links to a full guide.
Who called, cities and ZIPs, maps and spam patterns.
Take the map with youPoster format of the Delaware area code map with a QR code back to this page.↓ Download the printable PDF
Internet, wireless & stores across the state
AT&T home internet in Delaware
AT&T home internet is available across Delaware, checked address by address; every area code guide above lists its cities and what’s offered there.
AT&T Fiber: Ltd. avail/areas. Speeds based on wired connection. Actual speeds vary. For 5-GIG, single device wired speed maximum 4.7Gbps. For more info., visit att.com/speed101.
Start with home internet in Delaware, or pair it with wireless in an internet + wireless bundle.
AT&T wireless in Delaware
AT&T’s 5G network covers most of Delaware. ActiveArmor® spam blocking is included with every unlimited plan, your number stays yours when you move between Delaware codes, and great cell phone deals in Delaware are a tap away.
AT&T may temporarily slow data speeds if the network is busy. 5G req’s compatible plan & device. Coverage not available everywhere. Learn more at att.com/5Gforyou.
AT&T stores across Delaware
From the Wilmington metro to Georgetown, Newark and beyond, walk in for switching, porting, upgrades and hands-on help. Every area code guide lists its nearest stores.
Find stores in: Wilmington · Georgetown · Newark · Bear · Dover
