Holderness, New Hampshire Area Code

Holderness, NH Area Codes are

Holderness, NH is officially utilizing one area code which is area code 603.

In addition to Holderness, NH area code information read more about area code 603 details and New Hampshire area codes.

Holderness, NH is located in Grafton County and observes the Eastern Time Zone. View our Times by Area Code tool.

New Hampshire Area Code Map