Sender ID registration in India
What TRAI and the operators in India require for SMS sender IDs, how long approval takes, the accepted formats and sending rules, and how OmniChannels.ai registers yours.
- Registration
- Required
- Typical lead time
- 3–7 business days (DLT header registration)
- Alphanumeric sender ID
- Yes
- Regulator
- TRAI
Short answer
Yes. Sender ID registration is required in India (header + every message template registered on DLT before send). Approval typically takes 3–7 business days. Alphanumeric IDs of 6 characters as the operators currently issue them (TRAI allows up to 11) are accepted. OmniChannels.ai handles the filing across 4 operators and confirms current rules during onboarding.
Sender ID rules in India at a glance
| Regulator | Telecom Regulatory Authority of India (TRAI) |
|---|---|
| Registration required | RequiredHeader + every message template registered on DLT before send |
| Typical lead time | 3–7 business days (DLT header registration) |
| Alphanumeric sender ID | YesLatin letters, 6 characters as the operators currently issue them (TRAI allows up to 11) |
| Numeric long code / short code | 6-digit numeric headers, for promotional traffic |
| Accepted formats | Header registered on DLT; operators currently issue 6-character headers, letters for transactional and service traffic and digits for promotional (TRAI's definition allows up to 11 characters); the network appends -P, -S, -T or -G to show the category |
| Promotional senders | Headers are registered on the DLT platform together with every message template; promotional headers are numeric, and the network appends -P, -S, -T or -G to show the category. |
| Promotional sending hours | 10:00–21:00 local timeUnder TCCCPR 2018 the time bands outside 10:00–21:00 IST are off by default for promotional traffic, and recipients can block further time bands. Transactional messages are not blocked by these preferences. |
| Opt-in | TRAI TCCCPR 2018 requires verifiable opt-in. DPDP Act 2023 adds explicit consent capture and data-subject rights on top. Consent source, timestamp, and channel logged per-recipient. |
| Opt-out | Recipients block promotional messages, fully or by category, in the preference register (SMS or call 1909, USSD, IVRS, an approved app or an OTP-verified web portal), and operators add the details needed to revoke consent to every promotional message. Preferences and revoked consents are scrubbed on DLT before delivery. |
| Operators we reach | Reliance Jio, Bharti Airtel, Vi (Vodafone Idea) and BSNL |
| Last reviewed | 11 October 2026Sources: TRAI, TCCCPR 2018, consolidated with amendments (May 2026), TCCCPR (Second Amendment) Regulations 2025, VILPOWER DLT FAQ |
From BroadNet's regulatory research, last reviewed 11 October 2026. Rules change: we confirm them for your sender ID and traffic during onboarding.
Official sources: TRAI · TCCCPR 2018, consolidated with amendments (May 2026) · TCCCPR (Second Amendment) Regulations 2025 · VILPOWER DLT FAQ
How to register your sender ID in India through OmniChannels.ai
Sender ID registration fees are passed through at cost. We confirm the documents and the current rules for your traffic during onboarding.
Need the authorization letter?
Generate a ready-to-sign LOA or NOC for this country in English, Arabic or both. Free, and your details never leave your browser.
Generate your authorization letter- 1
Choose and check your sender ID
Pick a sender ID that matches your brand: Latin letters, 6 characters as the operators currently issue them (TRAI allows up to 11). Headers are registered on the DLT platform together with every message template; promotional headers are numeric, and the network appends -P, -S, -T or -G to show the category. Test it in the free sender ID checker first.
- 2
Send us your company details and use case
Tell us the legal entity, brand and what each sender ID will send (OTP, transactional or promotional). We confirm which supporting documents are currently needed.
- 3
We file your registration
We prepare and submit the application. Current process in India: Header + every message template registered on DLT before send.
- 4
Approval and test messages
Approval typically takes 3–7 business days. Once approved we send test messages on Reliance Jio, Bharti Airtel, Vi (Vodafone Idea) and BSNL and check the sender ID displays correctly.
- 5
Go live
Send through the REST API, SMPP or campaigns. Promotional messages go out 10:00–21:00 local time. Opt-out handling is applied to every promotional message.
Common reasons a sender ID is rejected in India
- A header outside the operators' current 6-character format (letters for transactional and service, digits for promotional), or message templates not registered on DLT before sending.
- Generic words instead of a brand, such as INFO, SMS, OTP, ALERT: regulators usually refuse them.
- Arabic, accented or other non-Latin letters: this market lists Latin letters only.
- Spaces or symbols such as _ & ! ( ): many operators strip or refuse them; use a hyphen or nothing.
Run your proposed sender ID through the free sender ID checker, preselected for India, before you apply.
Register your sender ID in India
Send us your brand and use case. We file the sender ID for 4 operators, run the test messages and connect it to the same API, SMPP and campaign tools you use for every other market.
Sender ID in India: questions
Do I need to register a sender ID in India?
Yes. Header + every message template registered on DLT before send. We submit it for you and confirm the current requirements during onboarding.
How long does sender ID registration take in India?
Typically 3–7 business days (DLT header registration), depending on the operator and the documents provided. We confirm the current timeline for your sender ID during onboarding.
Can I use an alphanumeric sender ID in India?
Yes. Alphanumeric sender IDs are accepted: Latin letters, 6 characters as the operators currently issue them (TRAI allows up to 11). Accepted formats: Header registered on DLT; operators currently issue 6-character headers, letters for transactional and service traffic and digits for promotional (TRAI's definition allows up to 11 characters); the network appends -P, -S, -T or -G to show the category.
When can I send promotional SMS in India?
Promotional window: 10:00–21:00 local time. Under TCCCPR 2018 the time bands outside 10:00–21:00 IST are off by default for promotional traffic, and recipients can block further time bands. Transactional messages are not blocked by these preferences. Headers are registered on the DLT platform together with every message template; promotional headers are numeric, and the network appends -P, -S, -T or -G to show the category.
What consent and opt-out rules apply in India?
TRAI TCCCPR 2018 requires verifiable opt-in. DPDP Act 2023 adds explicit consent capture and data-subject rights on top. Consent source, timestamp, and channel logged per-recipient. Recipients block promotional messages, fully or by category, in the preference register (SMS or call 1909, USSD, IVRS, an approved app or an OTP-verified web portal), and operators add the details needed to revoke consent to every promotional message. Preferences and revoked consents are scrubbed on DLT before delivery.
Who regulates SMS sender IDs in India?
Telecom Regulatory Authority of India (TRAI), together with the mobile operators (Reliance Jio, Bharti Airtel, Vi (Vodafone Idea) and BSNL). Official sources: TRAI, TCCCPR 2018, consolidated with amendments (May 2026), TCCCPR (Second Amendment) Regulations 2025, VILPOWER DLT FAQ.
Can I send from a numeric number or short code in India?
Yes. 6-digit numeric headers, for promotional traffic. Header registered on DLT; operators currently issue 6-character headers, letters for transactional and service traffic and digits for promotional (TRAI's definition allows up to 11 characters); the network appends -P, -S, -T or -G to show the category.
Related for India
Sender ID registration in nearby markets
- Bangladesh · 5–10 business days
- Cambodia · 7–14 business days
- Hong Kong · No pre-registration
- Indonesia · 5–10 business days
- Malaysia · 5–7 business days
- Nepal · 7–14 business days
- Pakistan · 7–14 business days
- Philippines · 5–10 business days
- All countries
Data: BroadNet regulatory research, reviewed 11 October 2026. URL: https://omnichannels.ai/sender-id/india/