Employment Verification The Work Number can be used anytime, anywhere – available 24 hours a day, 7 days a week. Access The Work Number via www.theworknumber.com or 1-800-367-2884 Available Client Service Center at 1-800-996-7566 or 1-800-424-0253 (TTY Deaf) Monday – Friday, 7 am – 8 pm (CST)