In our mobile, we get the sms with the code like DM-CBSSBI, TD-IDBIBK, AD-WEBSAM etc. Each code provide a meaning. First Letter from left means Operator code and the second letter means location code. From which location the operator organized the sms.

After hyphen ( – ) there is six characters called sender Id. Sender Id must be six character and can be chosen by user who use the sms gateway like bank, company.