Area Code Lookup
What Area Code Is Hillsdale?
Area code 517 · Michigan
Hillsdale uses area code 517. It is located in Michigan.
Area Code Serving Hillsdale
Frequently Asked Questions
What area code is Hillsdale?
Hillsdale uses area code 517. It is located in Michigan.
How do I call Hillsdale from outside the US?
To call Hillsdale from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-517-XXX-XXXX). The +1 is the country code for all NANPA countries.