Martinsburg, West Virginia, is served by primary area code 304 with the 681 overlay. Whether you are calling a Martinsburg number, verifying an unknown caller, or setting up a new local line, this guide covers every area code that serves the city, how local dialing works, the ZIP codes involved, and the scam-call patterns residents report most often.
Martinsburg Area Codes at a Glance
| Detail | Information |
|---|---|
| Primary Area Code | 304 |
| Overlay Code | 681 |
| Time Zone | Eastern Time (ET, UTC-5 / UTC-4) |
| Major Counties | Berkeley County |
| State | West Virginia |
Area Code Breakdown & Neighborhood Mapping
Martinsburg sits in the Eastern Panhandle of West Virginia, where 304 is the original area code and 681 was later added as an overlay serving the same geographic area. Because the two codes overlap, every local number keeps its own ten-digit identity and newly issued lines may receive either code.
Within the city, 304 covers the downtown historic district, the growing commuter subdivisions, and the residential neighborhoods along Foxcroft Avenue.
Across West Virginia, 304 connects to the rest of the state through standard long-distance dialing, and every call to or from Martinsburg follows the same North American Numbering Plan rules used nationwide. Knowing which code covers the city helps you spot out-of-area numbers at a glance and recognize when an incoming call may not be as local as it appears.
Local Dialing Rules & International Calling
Like the rest of the United States, Martinsburg uses 10-digit dialing, which is mandatory throughout any area served by an overlay. Dial the area code plus the seven-digit number for local calls. For domestic long distance, add a leading 1 (1 + 304 + number). To call Martinsburg from another country, dial your country’s exit code, then the U.S. country code +1, then the area code and the local number. Mobile users can enter +1 304 directly. Three-digit services such as 911 for emergencies and 988 for the Suicide and Crisis Lifeline are always dialed directly, with no area code required.
Major ZIP Codes in Martinsburg
Martinsburg ZIP codes include 25401, 25403, and 25404, covering the central, western, and northern parts of the city.
Cell Phones & Number Portability
Thanks to federal number portability, a 304 number no longer proves the caller is currently in Martinsburg. Residents who move away often keep their mobile numbers, and newcomers frequently arrive with codes from other states. New local service is typically assigned a 304 or 681 number, but the reliable habit is to dial all ten digits every time and to judge callers by who they are rather than by the area code they display.
Spam & Scam Call Warnings in Martinsburg
Martinsburg residents report the same robocall trends seen across West Virginia. Watch for these patterns:
- Neighbor spoofing: Scam calls that fake a 304 prefix so the number looks local. Screen unfamiliar callers even when the area code matches.
- Utility shutoff threats: Callers posing as the power or water company demanding immediate payment by gift card or wire. Real utilities never work this way.
- Government impersonation: Fake IRS, Social Security, or county “warrant” calls pressuring you to pay to avoid arrest.
- Local angle: As a fast-growing Washington-area commuter hub, Martinsburg sees frequent fake rental and real-estate scams, along with utility-shutoff robocalls demanding urgent payment.
- Auto-warranty and Medicare pitches: High-volume robocalls seeking personal, financial, or insurance details, often using a recorded voice and a callback number.
Let unknown calls go to voicemail, never share financial information with an inbound caller, and report unwanted calls to the FTC at reportfraud.ftc.gov.
Frequently Asked Questions
What area code does Martinsburg use?
Martinsburg uses area code 304, with 681 serving as an overlay across the same area.
Do I have to dial the area code for local calls?
Yes. Martinsburg uses 10-digit dialing, so include the area code even for calls within the city.
What county is Martinsburg in?
Martinsburg is located in Berkeley County.
What time zone is Martinsburg in?
Martinsburg observes Eastern Time (ET, UTC-5 / UTC-4).
How do I call Martinsburg from another country?
Dial your exit code, then +1, then 304 and the seven-digit local number.
Does the area code affect the cost of a call?
No. Call costs depend on your calling plan, not on the 304 area code. Most U.S. mobile and landline plans include nationwide calling, so reaching a Martinsburg number is treated the same as any other domestic call.
Can I keep my phone number if I move to Martinsburg?
Usually yes. Federal number portability lets you keep an existing mobile number when you relocate, which is why many Martinsburg residents carry numbers with area codes from other cities or states.
Stay Safe & Explore More
- Verify an unknown caller in our Scam Alerts directory.
- Comparing nationwide numbers? See our Toll-Free Numbers guides.