Check whether any Indian mobile number is DND-registered — one number at a time, or thousands in a single bulk upload. Every check runs against the official TRAI/NCPR registry, no free-tier shortcuts, no estimates.
The DND Number Checker is a paid, accuracy-first tool — there is no free tier, and no watered-down "estimate" mode. Every lookup, whether it's a single number entered manually or a CSV/TXT file with thousands of contacts, is checked against the official TRAI/NCPR DND registry. If you're preparing a promotional SMS or voice campaign and need to know exactly who you're legally allowed to message, this is the tool for that step.
Enter a mobile number, complete payment for the check, and get an instant DND / Non-DND result on screen.
Straightforward per-check and per-batch pricing — no subscription required for occasional use.
Every DND status result returned by this tool comes from the official TRAI/NCPR (National Customer Preference Register) registry — the same authoritative registry telecom operators use to block promotional SMS and calls at the network level. We don't rely on third-party aggregated guesses or stale cached lists.
Because subscribers can register or de-register from DND at any time, no DND check — however accurate at the moment it runs — stays valid indefinitely. For campaigns spaced weeks or months apart, re-check your list before each send rather than reusing an old result.
Checking large, recurring databases? See the DND Scrubbing Service for managed, scheduled cleaning instead of manual re-uploads. Building your own integration? Use the DND Filter API to check DND status programmatically. Or check our DLT registration support if your sender ID and templates aren't approved yet — you'll need both to run a fully compliant promotional campaign. See the full DND Filter service hub for all options.
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