For example, when you receive a SMS from MCX Exchange and If you want to know which company has send this message to you then you need to type the sender message’s last 6 digits in the above form .Enter: AD-MCXLTD.

So, the results will be like this: AD. 

A is Bharti Airtel; hence this is a Telecom Operator Code and 

D is Delhi; hence this is Telecom Circle Code.

MCXLTD is   MULTI COMMODITY EXCHANGE OF INDIA LIMITED.

We have listed major Telecom Operator Codes and Regional Codes to understand better.

The following are the list of SMS prefixes and their explanation: