Long codes are 10-digit numbers that allow users to send SMS messages to interact with applications or retrieve information. This document provides information about using long codes to check the status of EPFO claims, PPOs, and establishments in Rajasthan by sending SMS messages to a specific long code number at normal SMS rates. Users can check claim status by providing their employee code, establishment code, and extension code if any. PPO status and establishment status can also be checked by SMS by providing the relevant details.