Area Code Lookup
What Area Code Is Washington Zone 15?
Area code 301 · Maryland
Washington Zone 15 uses area code 301. It is located in Maryland.
Area Code Serving Washington Zone 15
Frequently Asked Questions
What area code is Washington Zone 15?
Washington Zone 15 uses area code 301. It is located in Maryland.
How do I call Washington Zone 15 from outside the US?
To call Washington Zone 15 from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-301-XXX-XXXX). The +1 is the country code for all NANPA countries.