State
Area Code 301
Washington, Frederick, Gaithersburg, Maryland
Local time now
…
Time zone
Eastern
Main cities
Washington, Frederick, Gaithersburg, Waldorf, Laurel, Hagerstown
In service since
1947
When you can make sales calls to 301 numbers
| Monday – Friday | 8 AM – 8 PM |
| Saturday | 8 AM – 8 PM |
| Sunday | 8 AM – 8 PM |
In the called person's local time. Guidance, not legal advice.
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Other area codes in Maryland
Questions about area code 301
- Where is area code 301?
- Area code 301 is in Maryland, covering Washington, Frederick, Gaithersburg, Waldorf.
- What time zone is area code 301?
- Eastern time.
- When can telemarketers call a 301 number?
- Federal rules allow sales calls from 8 AM to 9 PM local time, and Maryland has stricter hours shown on this page.
- Is 301 a toll-free number?
- No. 301 is a regular area code for Maryland. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.