Where the header and template ID come from
Your six-character header belongs to your PE; template IDs are 19-digit numbers assigned at approval.
DLT issues two identifiers that every outbound SMS must carry: the header (six characters, owned by your PE) and the template ID (19 digits, unique per approved content).
Where to find them in SMSLocal
- Compliance → Headers — all your approved six-character headers with their categories.
- Compliance → Templates — every template with its 19-digit ID, category, and live status.
- Campaigns → Composer — header and template ID auto-populate when you pick a template.
- API — both are required fields on /v2/sms/send; mismatch returns a 400 with a clear error.
If a template is suspended on the operator side, we show it in amber on the list with the last-known reason so you can take action before your next send.
Browse other help categories
Getting started
Create your SMSLocal account, add INR credits to your wallet, complete DLT registration, and send your first compliant SMS, WhatsApp, or OTP in under fifteen minutes.
SMS campaigns
SMS content templates, DLT routing, sender ID setup, delivery report statuses, bulk campaign scheduling, throttle controls, and automatic retry logic for India.
WhatsApp Business API
Complete guide to WhatsApp Business API — onboarding, Meta template approval, chatbot flow setup, shared team inbox, quality rating management, and conversation analytics.
AI WhatsApp Agents
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