Quick Answer
To send a bulk SMS in India, first register your business, sender ID and message template on DLT. Then log in to your SMS panel, upload your numbers from Excel or CSV, choose the approved template and sender ID, and click send. Developers can send the same message through an SMS API, with up to 100 numbers per request.
Before you send: the DLT checklist
Operators block any commercial SMS that does not match DLT records, so finish these first. It is a one-time setup.
| What to register | What it is | Example |
|---|
| Entity (PE) | Your business, with PAN or GST documents | ABC Retail Pvt Ltd |
| Header (sender ID) | The name shown as sender; 6 letters for service and transactional, numeric for promotional | ABCRTL |
| Template | The fixed message text with variable parts marked | Dear {#var#}, your order {#var#} is shipped. |
| Consent (if needed) | Proof that customers agreed to receive promotional or explicit service messages | Opt-in at checkout |
Our team helps with each item. See DLT registration and the rules in Is bulk SMS legal in India?
Step by step: send bulk SMS from the panel
1. Create an account
Register, complete KYC and add credits.
2. Finish DLT
Add your entity ID, header and template IDs in the panel.
3. Prepare the list
Numbers in one Excel or CSV column; names and other fields in the next columns.
4. Compose
Choose the template, sender ID and route; fill the variables.
5. Upload and send
Preview a sample, then send now or schedule for later.
6. Check reports
See delivered, failed and pending numbers in delivery reports.
How to send 1,000 SMS at once
Three ways, depending on how often you send and whether the list lives in software.
| Method | Best for | How 1,000 numbers are handled |
|---|
| Quick send in the panel | Small, occasional lists | Paste numbers, one per line or comma-separated |
| Excel / CSV upload | Campaigns and personalised messages | Upload one file; each row becomes one SMS, with merge fields from other columns |
| Contact groups | Lists you message every week | Save the list once as a group and pick it at send time |
| SMS API | Apps, CRMs, ERPs and websites | Send in batches of up to 100 numbers per request, so 1,000 numbers take 10 calls |
Sending bulk SMS through the API
One HTTP call sends to up to 100 comma-separated numbers. Loop through larger lists in batches of 100.
HTTP GET
https://www.smsgatewayhub.com/api/mt/SendSMS?APIKey=YOUR_API_KEY&senderid=ABCRTL&channel=2&DCS=0&flashsms=0&number=9198XXXXXXX1,9198XXXXXXX2&text=YOUR_APPROVED_TEMPLATE_TEXT&route=1
The response contains a JobId for each request; use it to fetch delivery reports. The full walkthrough with code is in our SMS API integration guide and the HTTP API reference.
Tips
Tips for a clean bulk SMS campaign
Match the template exactly
Only the variable parts may change. Extra words or spaces can cause a block.
Respect timing
Promotional SMS go out only between 9 am and 9 pm.
Watch the length
160 characters is one SMS; longer or Unicode text uses more credits.
Clean the list
Remove duplicates, invalid numbers and people who opted out.
Whitelist links
URLs and call-back numbers must be registered on DLT.
Frequently Asked Questions
How do I send a bulk SMS?
Register with a bulk SMS provider, finish DLT registration for your business, sender ID and template, then upload your numbers in the panel, choose the template and send. Software can send the same messages through the SMS API.
How can I send 1,000 SMS at once?
Upload an Excel or CSV file with 1,000 numbers in the SMS panel and send in one click, or use the SMS API and send in 10 batches of 100 numbers each.
Can I send bulk SMS from Excel?
Yes. Keep mobile numbers in one column and any names or other details in other columns. Upload the file in the panel and map the columns to the template variables to send personalised messages.
How many numbers can one API request contain?
The SendSMS API accepts up to 100 comma-separated mobile numbers per request. For bigger lists, send several requests or use the panel upload.
Can I send bulk SMS without DLT registration?
No. In India, operators block commercial SMS that do not come from a DLT-registered entity, header and template. Registration is a one-time step and our team helps you complete it.
Can I schedule a bulk SMS?
Yes. You can pick a date and time in the panel or pass a schedule time in the API. Promotional messages are only delivered between 9 am and 9 pm.
Send your first 1,000 SMS today
Create an account, get DLT guidance from our team and upload your list in minutes.