301 Area Code
Maryland, USA
Local time now · Eastern Time
3:44 AM
Area code 301 is in Maryland, USA, serving Germantown, Waldorf, Silver Spring and Frederick. It uses Eastern Time — the time there now is 3:44 AM. 240 and 227 are overlays for the same area, so local calls need 10-digit dialing. In service since 1947.
| Area code | 301 |
|---|---|
| Location | Maryland, USA |
| Major cities | Germantown, Waldorf, Silver Spring, Frederick, Gaithersburg, Bethesda, Rockville, Bowie |
| Time zone | Eastern Time |
| Overlay codes | 240, 227 |
| In service since | 1947 |
| Dialing | 1+10 digit dialing for all calls permissible at service providers discretion. |
Other area codes in Maryland
Time zone converterAll area codes
Frequently asked questions
Where is area code 301?
Maryland, USA — including Germantown, Waldorf, Silver Spring, Frederick and Gaithersburg.
What time zone is area code 301?
Eastern Time.
How do I call a 301 number from abroad?
Dial your international access code, then 1 (the country code), then 301 and the 7-digit number — for example +1 301 555 0100. From the UK or India dial 00 1 301 …; from Bangladesh 00 1 301 … .
Is a call from 301 a scam?
Not by itself — 301 is an ordinary geographic area code in Maryland. Numbers can be spoofed, so be careful with unexpected calls asking for money or personal details.
Sources: North American Numbering Plan Administrator (NANPA) NPA database (10/25/2026); major cities from Wikidata (CC0). An area code shows where a number was first assigned — with number portability and mobile phones, the caller may be anywhere.