As per TRAI guidelines, SMS’s are sent according to the following alphanumeric format: XY-SenderName, where X refers to the service provider and Y refers to the service area.
If you receive an SMS from AD-MEDIANAMA, that means that the SMS has been sent by MEDIANAMA, originating on Airtel’s network, from the Delhi service area. The codes mandated by TRAI are as follows:
Service Provider Codes (X):
A: Bharti Airtel and Bharti Hexacom
B: BSNL
C: Datacom
D: Aircel and Dishnet Wireless
E: Reliance Telecom
H: HFCL
I: Idea Cellular, Aditya Birla Telecom
L: Loop Telecom and BPL
M: MTNL
P: Spice Communications
R: Reliance Communications
S: S. Tel Ltd
T: Tata Teleservices, Tata Teleservices Maharashtra
U: Unitech Group of Companies (Telenor)
V: Vodafone Group of Companies
W: Swan Telecom
Y: Shyam Telecom
Service Area Codes (Y)
A: Andhra Pradesh
B: Bihar
D: Delhi
E: UP (East)
G: Gujarat
H: Haryana
I: Himachal Pradesh
J: Jammu & Kashmir
K: Kolkata
L: Kerala
M: Mumbai
N: North East
O: Orissa
P: Punjab
R: Rajasthan
S: Assam
T: Tamil Nadu, including Chennai
V: West Bengal
W: UP (West)
X: Karnataka
Y: Madhya Pradesh
Z: Maharashtra
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