MCX circular on Usage of designated numbering series (1600xx & 140xx) for Service, Transactional and promotional calls-regarding.
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Issuer: MCX
Trading Members are hereby informed that The Telecom Regulatory Authority of India (TRAI) vide its direction dated November 19, 2025, has mandated the following for entities regulated by RBI, SEBI and PFRDA.
➢ 1600xx-series numbers shall be used exclusively for service and transactional voice calls.
➢ 140xx-series numbers shall be used only for promotional calls.
The Exchange had earlier advised Trading Members to comply with TRAI directions issued from time to time. Trading Members are once again reminded to strictly adhere to these directions/guidelines.
Accordingly, Trading Members shall:
• Ensure strict compliance with the use of 1600xx-series numbers solely for service and transactional calls.
• Use 140xx-series numbers exclusively for promotional calls
For reference, the definitions of transactional, service, and promotional calls as provided in the Telecom Commercial Communications Preference Regulations, 2018 are enclosed as Annexure.
All members are requested to take note of the above and comply.