240 area code
Area code 240 is in Maryland, including Rockville, Frederick, Hagerstown and Gaithersburg. It's on Eastern Time.
Eastern Time
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Business hours are taken as 9 AM to 5 PM on weekdays. US telemarketing rules only allow sales calls between 8 AM and 9 PM local time.
Cities in area code 240
| City | Time zone |
|---|---|
| Rockville, MD | Eastern Time |
| Frederick, MD | Eastern Time |
| Hagerstown, MD | Eastern Time |
| Gaithersburg, MD | Eastern Time |
| Cumberland, MD | Eastern Time |
| Laurel, MD | Eastern Time |
| Germantown, MD | Eastern Time |
| Joint Base Andrews Naval Air Facility, MD | Eastern Time |
Other area codes in Maryland
More: look up another area code · time zone converter · US time zones map
Questions people ask
Where is area code 240?
Area code 240 is in Maryland, including Rockville, Frederick, Hagerstown and Gaithersburg.
What time zone is area code 240?
240 is on Eastern Time (UTC−5, UTC−4 in summer).
What time is it in area code 240 right now?
The live clock at the top of this page shows the current local time in area code 240.