TRAI Sending-Window Checker
See whether promotional SMS can legally be sent right now under TRAI's 10 AM to 9 PM window in Indian Standard Time, or check a scheduled send time.
The 10 AM to 9 PM rule
TRAI restricts promotional or commercial SMS to a daily window of 10 AM to 9 PM Indian Standard Time. Messages sent outside this window risk being blocked at the operator level, and repeated violations can affect your Sender ID's standing. This restriction exists to protect consumers from unwanted commercial messages at inconvenient hours.
What is exempt
Transactional SMS, such as OTPs, payment confirmations, delivery updates, and other messages tied to an action the customer directly initiated, are exempt from the sending-window restriction and can be sent at any hour.
Frequently Asked Questions
Under TRAI regulations, promotional or commercial SMS may only be sent between 10 AM and 9 PM Indian Standard Time. Sending promotional messages outside this window is not permitted.
No. Transactional SMS, including OTPs and service messages tied to a transaction the customer initiated, are exempt from the sending-window restriction and can be sent 24 hours a day.
This tool always checks against Indian Standard Time (IST), regardless of your device's local time zone, since that is the reference time zone for TRAI's SMS regulations.
No. This is a read-only checker that runs in your browser. It does not schedule, queue or send any messages.
Need to schedule a campaign?
Our platform lets you schedule campaigns in advance so you never miss the compliant sending window.
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