Alton Highway Dept Claim Listing Return to Directory Rating (average) (0) Business Genre Contractor, Highway Business Website Address alton.nh.gov Business Address, City PO Box 659, Alton ZIP Code 03809 Business Phone Number 6038756808 Business Fax 6038756809 Ratings There are no reviews yet. Please login to leave a review. Please login to claim this listing. Username*: Email*: Password*: Log in | Lost your password?