Company Presence

Prefixes

SMS Sender ID prefixes 

Transactional SMS

Promotional SMS

Both of them have prefix (VM and AX) which are automatically set by the operator delivering this particular message. Because we work with different SMS gateways who internally work with others & eventually operators who may try to send your SMS via the cheapest & best route possible, the prefix is unpredictable. These prefixes are meant to inform the recipient about the channel used in delivering the SMS. Typically, they use this information to report a NDNC violation. 

Headers assigned by the Access Providers to Principal Entities (Business, legal or Government Entities)
Telecom Commercial Communications Customer Preference Regulations (TCCCPR) 2018 provides for assigning alpha-numeric headers to Principal Entities (Business or legal entities) for the purpose of sending Commercial Communications via Short Message Service (SMS). These headers are assigned by a TSP to the Principal Entity to identify itself while sending messages to the subscribers. Currently these headers are also prefixed by two alpha characters separated by a hyphen from the header and it is used to identify originating access providers (OAP). Currently fixed length of six alphanumeric characters are being used to assign headers and total nine characters including prefixes and separator are being used. However regulations permit length to go upto 11. Headers are also known as Sender ID. Typical format and structure of the header with prefixes is as below:

XY – ABCDEF
X denotes TSP (OAP);
Y denotes License Service Area (LSA of OAP)
ABCDEF is a header assigned to the Principal Entity

Table A: LIST OF CODES FOR SERVICE PROVIDERS (‘X’)

Table B: LIST OF CODES FOR SERVICE AREA (‘Y’)

Name of Service Providers
Code
Aircel Ltd/ Dishnet Wireless Ltd
D
Bharti Airtel Ltd/ Bharti Hexacom Ltd
A
Bharat Sanchar Nigam Ltd
B
Quadrant Televentures Limited
Q
Mahanagar Telephone Nigam Ltd
M
Reliance Communications Ltd
R
Reliance Jio Infocomm Ltd
J
Reliance Telecom Ltd
E
Tata Teleservices Ltd/ Tata Teleservices (Mah) Ltd
T
Vodafone Idea Ltd
V
V-CON Mobile & Infra Private Ltd
C
Service Area
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
Tamil Nadu
T
UP-East
E
UP-West
W
West Bengal
V

Now then, If you got an SMS from "VM-OBLIGR" - This SMS was delivered by Vodafone Idea Ltd Mumbai. "AX-666333" - Would then be Promo SMS by/from Airtel Karnataka