Area Code Lookup
What Area Code Is Washington Zone 12?
Area code 240 · Maryland
Washington Zone 12 uses area code 240. It is located in Maryland.
Area Code Serving Washington Zone 12
Frequently Asked Questions
What area code is Washington Zone 12?
Washington Zone 12 uses area code 240. It is located in Maryland.
How do I call Washington Zone 12 from outside the US?
To call Washington Zone 12 from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-240-XXX-XXXX). The +1 is the country code for all NANPA countries.