909 W. Euclid Ave.
Arlington Heights, IL 60004
Phone: 847-253-7806 or 847-253-7457 or (800) ASK-USPS (275-8777)
Fax: 847-253-7460
Hours: M-F 8:30 a.m.-6 p.m.; Sat. 8:30 a.m.-1 p.m.
URL: http://www.usps.com 
Description: The (800) ASK-USPS number will give zip code information, identify your closest post office, hours, etc., via an automated system.