USSD is a protocol used to send text messages over Global System for Mobile Communications (GSM) networks. A typical USSD short code starts with an asterisk (*) followed by digits and terminates with a #. An example of a USSD code is *124#, used for checking mobile credit balance.
Mobileussdcodes.com is a telecom network-related information provider website, where you can find USSD codes-related information for the globel companies.