When a user receives any message from any service provider, sender ID along with a prefix is displayed in your message inbox. For eg. VK-INFINI, DM-HRINFI, BW-AMAZON, VM-MYNTRA etc.

The prefixes VK, DM, BW etc. are generally displayed are associated with Telecom Operator codes. We follow rules framed by Telecom Regulatory Authority of India (TRAI) and according to TRAI rules,

  • Sender ID should be restricted to 6 characters. (E.g VK – INFINI)
  • The prefix has a specific meaning. That is:
    • The first character of prefix defines the Operator:


Operator Code
Aircel, Dishnet Wireless D
Airtel A
BSNL B
BPL Mobile/Loop Telecom L
Idea Cellular I
MTNL M
Reliance Communications R
Reliance Telecom E
Tata Teleservices T
Unitech U
VodafoneVideocon
VH
  • The latter character represents the location of the Operator:


Operator Code
Andhra Pradesh A
Assam S
Bihar B
Delhi D
Gujarat G
Haryana H
Himachal Pradesh I
Jammu & Kashmir J
Karnataka X
Kerala L
Kolkata K
Madhya Pradesh Y
Maharashtra Z
Mumbai M
North East N
Orissa O
Punjab P
Rajasthan R
Tamilnadu T
UP-East E
UP-West W
West Bengal V