240 Area Code
Maryland, USA
Local time now · Eastern Time
3:44 AM
Area code 240 is in Maryland, USA, serving Germantown, Silver Spring, Frederick and Gaithersburg. It uses Eastern Time — the time there now is 3:44 AM. 227 and 301 are overlays for the same area, so local calls need 10-digit dialing. In service since 1997.
| Area code | 240 |
|---|---|
| Location | Maryland, USA |
| Major cities | Germantown, Silver Spring, Frederick, Gaithersburg, Bethesda, Rockville, Bowie, Wheaton |
| Time zone | Eastern Time |
| Overlay codes | 227, 301 |
| In service since | 1997 |
| Dialing | 1+10 digit dialing for all calls permissible at service providers discretion. |
Other area codes in Maryland
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Frequently asked questions
Where is area code 240?
Maryland, USA — including Germantown, Silver Spring, Frederick, Gaithersburg and Bethesda.
What time zone is area code 240?
Eastern Time.
How do I call a 240 number from abroad?
Dial your international access code, then 1 (the country code), then 240 and the 7-digit number — for example +1 240 555 0100. From the UK or India dial 00 1 240 …; from Bangladesh 00 1 240 … .
Is a call from 240 a scam?
Not by itself — 240 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.