Behavior Data Systems Additional information can be provided upon request by writing: Behavior Data Systems, Ltd. P.O. Box 44256 Phoenix, Arizona 85064-4256. Our telephone number is (602) 234-3506 Our fax number is (602) 266-8227 and our e-mail address is firstname.lastname@example.org. Behavior Data Systems offices are open 8a.m. to 4p.m. Mountain Standard Time, Mondays through Fridays (not open on holidays).