Area Code Lookup
What Area Code Is Hammond?
2 area codes serve Hammond
Hammond is served by area codes 447, 985. It spans Illinois and Louisiana.
Area Codes Serving Hammond
Frequently Asked Questions
What area code is Hammond?
Hammond is served by area codes 447, 985.
Why does Hammond 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). Hammond now has 2 area codes — 447 and 985 — covering the same or overlapping areas.
How do I call Hammond from outside the US?
To call Hammond from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-447-XXX-XXXX). The +1 is the country code for all NANPA countries.