Area Code Lookup
What Area Code Is Westminster?
2 area codes serve Westminster
Westminster is served by area codes 443, 657. It spans Maryland and California.
Area Codes Serving Westminster
Frequently Asked Questions
What area code is Westminster?
Westminster is served by area codes 443, 657.
Why does Westminster 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). Westminster now has 2 area codes — 443 and 657 — covering the same or overlapping areas.
How do I call Westminster from outside the US?
To call Westminster from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-443-XXX-XXXX). The +1 is the country code for all NANPA countries.