Area Code 301
Area code 301 covers Washington and nearby cities including Frederick, Gaithersburg, Rockville in Maryland, in the Eastern Time.
Area code 301 quick facts
| Location | Washington, Maryland |
|---|---|
| Time zone | Eastern Time |
| In service | 1947-01-01 |
| Overlay codes | 240, 227 |
| Nearby codes | 227, 240, 202, 771, 571, 703 |
| Carrier coverage | 786 prefixes; 27% wireless |
| FTC complaint data | 426 complaints across 103 numbers |
| Data current as of | August 2, 2026 |
Is a call from 301 a scam? Who called me from 301?
FTC complaints involving 301 numbers
Numbers shown with area code 301 in the FTC's Do Not Call “Reported Calls” database (recent reporting window). Most common reported reasons: “Other”, “Dropped call or no message”, “Reducing your debt (credit cards, mortgage, student loans)”.
Most-complained 301 numbers:
- (301) 349-9473 — 20 complaints
- (301) 881-3052 — 17 complaints
- (301) 732-5340 — 10 complaints
- (301) 307-5443 — 10 complaints
- (301) 329-3899 — 10 complaints
These are FTC Do Not Call complaints filed about specific numbers shown with this area code — frequently spoofed. The area code itself is not a scam. See the most-reported area codes and the most-reported phone numbers nationwide.
Cities in area code 301
Washington, Frederick, Gaithersburg, Rockville, Bowie, Hagerstown, Aspen Hill, Chillum, Clinton, College Park, Cumberland, Fairland
Area codes by city
Carriers in area code 301
Area code 301 spans 786 prefixes, about 27% wireless. Top carriers: VERIZON MARYLAND, INC., OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC, ONVOY, LLC - MD, CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD. Look up the carrier and line type for a 301 number.
Other Maryland area codes
Nearby area codes
Frequently asked questions
Where is area code 301?
Area code 301 covers Washington and nearby cities including Frederick, Gaithersburg, Rockville in Maryland, in the Eastern Time.
What cities use area code 301?
Area code 301 serves Washington, Frederick, Gaithersburg, Rockville, Bowie, and 22 other communities in Maryland.
What time zone is area code 301 in?
Area code 301 is in the Eastern Time (America/New_York).
How do you dial a 301 number?
Dial all 10 digits: 301 followed by the 7-digit local number. From abroad, dial +1 301 and the local number.
Is a call from area code 301 a scam?
A 301 number is geographically tied to Maryland, but caller ID can be spoofed, so the displayed area code does not prove where a caller really is. If you did not expect the call, do not share personal information and consider looking the number up.
Is 301 a country code?
No. 301 is a US area code (a domestic 3-digit code), not a country code. The country (calling) code for the United States is +1, shared across the North American Numbering Plan. So a full 301 number written for international dialing looks like +1 301 followed by the 7-digit local number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.