Area Code 301
301 area code is being used for dialing/telecommunication purposes in Maryland, covering 34 major cities and 7 counties, according to (NANP) North American Numbering Plan for 3-digit Numbering Plan Area (NPA) code. All the areas using NPA code 301 is part of EST (Eastern Standard Time) timezone.
301 Area Code Covers 34 Cities
Check this below table to know 34 major cities (having more than 20,000 population) in Maryland using numbering plan area code 301 for dialing/telecommunication purposes.
| City | ZIP Codes | Population |
|---|---|---|
| Bethesda, MD | 5 | 66,316 |
| Bowie, MD | 7 | 57,922 |
| Clarksburg, MD | 1 | 28,337 |
| Clinton, MD | 1 | 40,224 |
| College Park, MD | 3 | 34,416 |
| Fort Washington, MD | 2 | 25,825 |
| Frederick, MD | 6 | 78,390 |
| Gaithersburg, MD | 14 | 69,016 |
| Germantown, MD | 4 | 90,210 |
| Greenbelt, MD | 3 | 24,646 |
| Hagers city, MD | 7 | 43,374 |
| Hyattsville, MD | 11 | 20,851 |
| Montgomery Village, MD | 2 | 34,748 |
| Olney, MD | 2 | 35,522 |
| Owings Mills, MD | 1 | 34,999 |
| Potomac, MD | 2 | 46,499 |
| Rockville, MD | 10 | 67,142 |
| Silver Spring, MD | 16 | 81,808 |
| Suitland, MD | 3 | 25,839 |
| Waldorf, MD | 4 | 81,077 |
7 Counties Using 301 as Area Code
301 area code is being used in 7 counties of Maryland for dialing/telecommunication purposes.
- Allegany County, MD
- Charles County, MD
- Frederick County, MD
- Howard County, MD
- Montgomery County, MD
- Prince George, MD
- Washington County, MD
28 More NPA Codes Related to Area Code 301
1 or more of these 28 NPA codes are being used in the same or adjacent states of Maryland in the United States.
- 215 Area Code
- 223 Area Code
- 240 Area Code
- 267 Area Code
- 272 Area Code
- 276 Area Code
- 302 Area Code
- 304 Area Code
- 410 Area Code
- 412 Area Code
- 434 Area Code
- 443 Area Code
- 445 Area Code
- 484 Area Code
- 540 Area Code
- 570 Area Code
- 571 Area Code
- 610 Area Code
- 667 Area Code
- 681 Area Code
- 703 Area Code
- 714 Area Code
- 717 Area Code
- 724 Area Code
- 757 Area Code
- 804 Area Code
- 814 Area Code
- 878 Area Code