Area Code Lookup
What Area Code Is Green River?
Area code 307 · Wyoming
Green River uses area code 307. It is located in Wyoming.
Area Code Serving Green River
Frequently Asked Questions
What area code is Green River?
Green River uses area code 307. It is located in Wyoming.
How do I call Green River from outside the US?
To call Green River from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-307-XXX-XXXX). The +1 is the country code for all NANPA countries.