Area Code Lookup
What Area Code Is Washington Zone 5?
Area code 301 · Maryland
Washington Zone 5 uses area code 301. It is located in Maryland.
Area Code Serving Washington Zone 5
Frequently Asked Questions
What area code is Washington Zone 5?
Washington Zone 5 uses area code 301. It is located in Maryland.
How do I call Washington Zone 5 from outside the US?
To call Washington Zone 5 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.