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Who Sent That Message?

sms You must have received messages from various service providers like Banks, Pizza stores and such other vendors. Apart from being annoying at times, there is another thing that is common between these messages. Instead of showing sender’s numbers they show some alphabetical codes, for e.g. TD-TXNALERT or LM-IBIBO etc.

Have you ever wondered what these codes stand for? I did a little research on this and found some interesting information to share.

The code is of the format XY-SrvName. Here X represents the mobile operator sending the message, and Y represents the region. SrvName is the name under which the vendor using the bulk message facility is registered with the mobile operator. Sounds confusing? It’ll be clear in a minute.

Let’s take the example of ICICI bank. When you receive a message from ICICI bank, the sender name displayed is TM-ICICIBANK. Here T is the code for the mobile operator, M is the region from which the message is sent and ICICIBANK is the name under which ICICI Bank sends its message.

Now the obvious question is how to decipher this code. I have tried to document a list of all codes that I found.

Mobile Operator Code

Mobile Operator

Code (X)



Bharti Airtel




BPL Mobile/Loop Telecom


Idea Cellular




Reliance Communication


Reliance Telecom


Spice Communication


Tata Teleservices




Region Code

UPDATE: There was a small error in the list below which has been updated now after Deepak Gupta pointed it out. Thanks Deepak 🙂


Code (Y)

Andhra Pradesh








Jammu & Kashmir




Tamil Nadu




Bihar & Jharkhand


U.P.(West) & Uttaranchal


U.P. (East)






So if you receive a message with starting two letters as RJ, it means it is sent through Reliance Communication from J&K region.

Why Such A Format Is Used?

The reason this format is followed is so that TRAI (Telecom Regulatory Authority of India) can keep a tab on the operators and service providers and attend to customer’s grievance if they complain against bulk messages.

I have tried to include almost all the codes that I came across, but I might have missed some. So if you come across a code that is not in the above list, do share it with us through your comments and I’ll update the list.

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28 Responses to Who Sent That Message?

  1. Praveen D September 22, 2010 at 5:45 pm #

    Hey some great info there dude! 🙂 …I get badly hit by TM messages though i stay in Hyd, kind of annoying. Is there any way of blocking them?

  2. David September 22, 2010 at 11:01 pm #

    Great job! This is really very nice post. I like it. Thanks for sharing this post.

  3. Vinayak Nagri September 23, 2010 at 2:46 am #

    Nice one buddy
    Once I also thought that why these letters are used and today the doubts are cleared 🙂

  4. Anshul September 23, 2010 at 7:15 am #

    Glad that you liked it David 🙂

  5. Anshul September 23, 2010 at 7:16 am #

    Yeah it gets irritating at times. Unfortunately I don't know of a method to stop them. But I'll look for it and will let you know if I find one.

  6. Anshul September 23, 2010 at 7:17 am #

    Good to know that it cleared your doubts Vinayak. 🙂

  7. Carpenter oak September 23, 2010 at 2:02 pm #

    Thanks for sharing your knowledge great post….

  8. S.R.Ayyangar September 23, 2010 at 11:13 am #

    Informative post.

  9. Adi September 23, 2010 at 12:33 pm #

    interesting info. Now only if this could be leveraged to block them thru an app on the phone

  10. Goutham September 23, 2010 at 2:02 pm #

    Great post dude. 🙂 I like it. Thanks for sharing. 🙂


  11. Barbell September 24, 2010 at 6:10 am #

    Oh Good to know this trick. Do you also have this same format for USA?

  12. rental mobil murah September 24, 2010 at 9:28 am #

    thanks for the info and explanation provided

  13. Shrinath Vashishtha September 24, 2010 at 5:40 pm #

    Pretty informative!

  14. Anshul September 25, 2010 at 2:38 pm #

    Thanks Sir 🙂

  15. Anshul September 25, 2010 at 2:39 pm #

    Yeah that would be so much better 🙂

  16. Anshul September 25, 2010 at 2:39 pm #

    Thanks Goutham 🙂

  17. Anshul September 25, 2010 at 2:43 pm #

    Thanks "Carpenter Oak"

    A little off topic- please use your name instead of keywords. It makes the comment look as spam due to which it gets deleted at times. Also it looks a bit weird calling someone "Carpenter Oak" 🙂

  18. Anshul September 25, 2010 at 2:44 pm #

    I'm not sure about the US Barbell. Will let you know if I find some information.

  19. Anshul September 25, 2010 at 2:45 pm #

    Glad u liked it "rental mobil murah" 🙂

    A little off topic- please use your name instead of keywords. It makes the comment look as spam due to which it gets deleted at times. Also it looks a bit weird calling someone "rental mobil murah"

  20. Anshul September 25, 2010 at 2:45 pm #

    Thx Sir 🙂

  21. RFID Asset Tracking October 7, 2010 at 8:25 am #

    Great post. Now I know what those codes mean, thanks to you. I'm sure you've done a lot of research for this info. Thanks and great job, I salute you.

  22. coach handbags October 11, 2010 at 3:43 am #

    It was a nice blog. I am new to this community and i hope you all will update the events day by day. Keep blogging an I like to share this information with all my friends. Thanks a lot. Regards to you.

  23. Jaganmangat October 23, 2010 at 12:39 pm #

    hey its really true,i usually receives messages from VP-corpbank or VP-offers which means v for vodafone and p for punjab as i am using vodafone mobile service and living in punjab.

  24. Himadri Dimri October 28, 2010 at 7:05 am #

    Really nice info. There should be some way to block them also? Is it ?

  25. harsh July 3, 2012 at 2:42 pm #

    CHK THE DND OPTION………………..

    Customers (landline and mobile) who do not want to receive commercial
    communications can dial or SMS to 1909 (toll free) and register in either
    of the two categories:

    Fully Blocked Category- stoppage of all commercial Calls/SMS
    … Partially Blocked Category- stoppage of all commercial Calls/SMS except
    SMS from one of the opted preferences

    For registering option using SMS, for ‘fully blocked category’, write
    “START 0” and send it to 1909. For ‘partially blocked category’, send SMS
    ‘START’ with one or multiple options from the list of seven categories.

    There are at present 7 preferences to choose from:
    1. Banking/Insurance/Financial Products/Credit Cards
    2. Real Estate
    3. Education
    4. Health
    5. Consumer goods and automobiles
    6. Communication/Broadcasting/Entertainment/IT
    7. Tourism

    For example: To receive messages relating to only ENTERTAINMENT, then send
    SMS “START 6” to 1909. Similarly, for receiving messages relating to Real
    Estate and Education, send SMS “START 2,3” to 1909.

    On successful registration, customer will receive an SMS confirming
    exercised options and a Unique Registration Number within 24 hrs. The
    registration will be effective within 7 days of placing the request with
    the service provider. The customers can check the status of their
    registration by clicking on “Customer Registration Status”.

    Customer can also change the preferences after 7 days of registration or
    the last change of preference.

    • Anshul July 9, 2012 at 11:58 pm #

      Thanks a lot Harsh for taking out time to provide this info 🙂

  26. Ilayaraja November 12, 2012 at 10:26 am #

    Good post

  27. Harry October 28, 2019 at 9:57 am #

    Could any of these messages also be spam? I got some msgs from VM-ICICIB saying my credit card is approved and auto debit is activated. On calling bank’s cust care, they confirmed that there is no credit card associated with my account or regd mobile number. How can we say spam from genuine on just looking at the sender?..how in this case as it looks so convincing that it is the bank itself?

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