Yes, a New Hampshire E-ZPass can be used in several other states that participate in the E-ZPass system. The E-ZPass program is designed for interoperability, which means that you can use your E-ZPass tag not only in New Hampshire but also in states such as Massachusetts, New York, Maine, New Jersey, and more. However, it is important to be aware that while your E-ZPass may work in these states, the toll rates and the specific rules governing tolling may vary. It is advisable for users to familiarize themselves with the toll policies of the states they plan to travel through. For detailed information about tolls and usage in other states, users may visit the specific state's toll authority website or look for resources on the current E-ZPass homepage.