ARRL Headquarters is open from 8 AM to 5 PM Eastern time, Monday through Friday, except holidays. Our address is:

225 Main Street
Newington, CT 06111-1400
USA

Order/Member Service Hotline 1-888-277-5289 (toll-free US only)
Monday through Friday, 8 am to 5 pm Eastern time.

You can call us at (voice) +1 860-594-0200 and (fax) +1 860-594-0259.