The contact number for Walmart is 800-492-5678. It is the number that Walmart Employees utilize to report any unscheduled absences. When you call this number, you will be required to provide information such walmart call in number as your DOB, WIN, name, and store number. Normally, Walmart employees are obliged to notify their supervisor or manager of any absences or leave requests as quickly as possible, either in person or by phone. The phone number or contact details for reporting an absence may be given to the employee during orientation or training, or it may be placed in a common location.