Area Code 301 at a Glance
| Area code | 301 |
| Region | Maryland |
| Country | United States |
| Primary timezone | America/New_York |
| Dialing format | +1 (301) NXX-XXXX |
Cities and Places Using Area Code 301
Based on prefix-level carrier data, area code 301 covers places including:
- Bethesda, MD
- Silver Spring, MD
- Rockville, MD
- Gaithersburg, MD
- Frederick, MD
- Hagerstown, MD
- Laurel, MD
- Waldorf, MD
- Germantown, MD
- Temple Hills, MD
- Cumberland, MD
- Upper Marlboro, MD
Frequently Asked Questions
Where is area code 301?
Area code 301 serves Maryland, United States.
Who is calling me from area code 301?
A call from area code 301 most likely originates from Maryland, but caller ID can be spoofed. If an unknown caller asks for personal or payment information, hang up and call the organization back on its official number.
How do I dial a 301 number?
Within North America: dial 1-301 followed by the 7-digit number. From abroad: your international prefix (like 00 or +), then 1 301 and the number.