Area Code Lookup
What Area Code Is Baltimore?
4 area codes serve Baltimore
Baltimore is served by area codes 410, 443, 667, 740. It spans Maryland and Ohio.
Area Codes Serving Baltimore
Frequently Asked Questions
What area code is Baltimore?
Baltimore is served by area codes 410, 443, 667, 740.
Why does Baltimore 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). Baltimore now has 4 area codes — 410 and 443 and 667 and 740 — covering the same or overlapping areas.
How do I call Baltimore from outside the US?
To call Baltimore from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-410-XXX-XXXX). The +1 is the country code for all NANPA countries.