Area Code Lookup
What Area Code Is Caldwell?
2 area codes serve Caldwell
Caldwell is served by area codes 973, 979. It spans New Jersey and Texas.
Area Codes Serving Caldwell
Frequently Asked Questions
What area code is Caldwell?
Caldwell is served by area codes 973, 979.
Why does Caldwell 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). Caldwell now has 2 area codes — 973 and 979 — covering the same or overlapping areas.
How do I call Caldwell from outside the US?
To call Caldwell from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-973-XXX-XXXX). The +1 is the country code for all NANPA countries.