Sending SMS to India
India runs the strictest A2P framework of any major market. TRAI requires every commercial message to pass through a blockchain-based DLT registry: the sender, the header and the exact template must all be pre-registered, and anything that does not match a registered template is rejected by the operator rather than delivered late.
How your name appears in India
What shows up in the recipient’s inbox, and what has to be true before it can.
Sender ID rules for +91
Six-character alphanumeric headers, registered on the DLT platform against your entity. Headers are tied to a content category — a promotional header cannot carry transactional content.
+91 XXXXX XXXXX — ten digits, mobile numbers starting 6, 7, 8 or 9.Delivers across every major network in India: Reliance Jio, Bharti Airtel, Vodafone Idea, BSNL.
What people send most: OTP and transaction alerts for banking and fintech · Order and delivery updates for e-commerce · Government and utility service notifications.
Message length: under the standard SMS encoding, a segment typically holds 160 GSM-7 characters, or 70 once a message uses Unicode — Arabic, Chinese, Cyrillic, emoji. Longer messages split into several segments automatically and are billed per segment; exact limits are confirmed for India as part of onboarding.
What India requires
These are the constraints that decide whether a message is delivered, filtered or blocked — not general best practice.
Requirement 1 of 4: DLT registration covers three things separately: entity, header and message template. All three must be approved.
DLT registration covers three things separately: entity, header and message template. All three must be approved.
Checked automatically on every message we send to India — nothing for you to track by hand.
Mobile operators in India
We deliver to every network below. Route quality is measured per operator, not averaged across the country.
What businesses send in India
Time-critical — it has to land in seconds, which is the reason SMS still wins here over push or email.
Keeps the recipient's attention without needing an app open, for the moment they actually care about the update.
Cuts no-shows more effectively than email — most people notice a text within minutes of it arriving.
How to dial India
Every part of the number, laid out separately, then the same thing written the way an API expects it.
+91 — +91 XXXXX XXXXX — ten digits, mobile numbers starting 6, 7, 8 or 9.
From abroad, replace your exit code with +, then 91, then the national number — dropping the national trunk prefix if the country uses one (a leading 0 in most, though not in the +1 numbering plan). Store numbers in E.164 (+91…) and they work from any country and any API.
India by the numbers
The figures below come from public country data and set the context for how much SMS traffic India actually carries.
All country calling codes
Looking for a different country? Pick a continent, or search by name, code or ISO — no need to go back to the directory page.
Other country codes
Countries with neighbouring dialling codes.
Start sending to India
Direct routes, per-operator delivery reporting and sender ID handling for +91 — from one dashboard or one API call.