Walmart is pleased to launch “The Work Number For Everyone” in association with TALX Corporation. This service delivers job verification information to credit and reference verifiers quickly upon request walmart call out number via a touch-tone phone. In this guide, we learn a platform where Walmart employees may report unplanned absences. Although there is no formal rule, Walmart employees are recommended to call in sick at least three hours before their shift begins. You can phone in as early as 24 hours in advance if you want to prepare ahead.