Area Code Lookup
What Area Code Is Washington Zone 14?
2 area codes serve Washington Zone 14 · Maryland
Washington Zone 14 is served by area codes 240, 301. It is located in Maryland.
Area Codes Serving Washington Zone 14
Frequently Asked Questions
What area code is Washington Zone 14?
Washington Zone 14 is served by area codes 240, 301. It is located in Maryland.
Why does Washington Zone 14 have multiple area codes?
As demand for phone numbers increased, NANPA added area codes through splits (dividing the region) or overlays (layering a new code over the same geography). Washington Zone 14 now has 2 area codes — 240 and 301 — covering the same or overlapping areas.
How do I call Washington Zone 14 from outside the US?
To call Washington Zone 14 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.