Is 1252 at the beginning of the message an epidemic prevention message?

According to reports, there are two main SMS ports for Guangzhou Mobile to send epidemic prevention reminders: the first is ordinary SMS, and the port starts with 10086 or 10657; The second category is 5G messages, and the port starts with 12520.

Short message is a telecommunication service in digital mobile communication system. It is a non-real-time and non-voice data communication service to transmit text or digital short messages through the signaling channel and signaling network of mobile communication system.

SMS can be initiated by mobile communication terminals (mobile phones), SMS platform servers of mobile network operators, and network service providers (including ICP and ISP). ) interconnected with the SMS platform of mobile operators.