Understanding SMS Sender ID (Header): Types, Approval Process, Usage & More
What is an SMS Sender ID (Header)? A Complete Guide
Introduction:
In the world of bulk SMS and mobile marketing, the first thing your customer sees is the Sender ID — also known as the SMS Header. It reflects your brand identity, builds trust, and differentiates genuine messages from spam. This blog explains everything you need to know about SMS Sender IDs — from structure to approval process, types, usage, and more.
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What is a Sender ID (Header)?
A Sender ID (Header) is a unique identifier that appears on the recipient’s phone when they receive an SMS from your business. Instead of receiving messages from unknown numbers, your audience sees your brand name or business identity, making your communication credible and trustworthy.
For example:
• VK-COREWB
• TD-AMAZON
• BZ-PAYTM
Here, “COREWB”, “AMAZON”, “PAYTM” are the Sender IDs (6-character headers) registered with telecom operators.
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Understanding the Structure – What Does “VK-COREWB” Mean?
Let’s break down the example VK-COREWB:
• Prefix (VK): The first two characters are system-generated by the telecom operator:
• V – Represents the operator (e.g., Vodafone)
• K – Represents the service area or region
Note: These prefixes are automatically assigned; businesses only register for the 6-character Sender ID.
• Sender ID (COREWB): The last 6 characters (alphanumeric) are defined by your brand. This must be related to your business name or service.
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Types of Sender IDs (Headers)
There are two primary types of sender IDs based on SMS content and intent:
1. Promotional Headers (Numeric)
• Format: Numeric (e.g., 777777)
• Usage: Advertising, offers, deals, etc.
• Delivery: Only between 9 AM to 9 PM, not delivered to DND numbers
• Requires content template approval
• Headers are not brand-specific
2. Transactional / Service Headers (Alphanumeric)
• Format: Alphanumeric (e.g., COREWB)
• Usage: OTPs, alerts, order updates, service info
• Delivery: 24x7 including DND numbers
• Must match your registered brand or company name
• Requires DLT registration and template approval
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Temporary vs Permanent Sender ID:
Temporary Sender ID:
• Given by the SMS provider for testing or initial use
• Usually active for a limited period
• Not approved by DLT (Distributed Ledger Technology)
Permanent Sender ID:
• Registered and approved via DLT platforms
• Used for long-term business communication
• Fully traceable and compliant with TRAI regulations
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Sender ID Approval Process via DLT (Distributed Ledger Technology)
To maintain transparency and prevent SMS spam, TRAI has mandated the use of DLT platforms for sender ID registration.
Here’s how to register your Sender ID:
Step-by-Step Process:
1. Register on a DLT Portal
Choose from approved DLT operators like:
• VILPOWER (Vodafone Idea)
• Jio DLT
• Airtel DLT
• BSNL DLT
2. Complete KYC
Upload PAN card, business registration certificate, GST details, and proof of authorization.
3. Add Your Sender ID (Header)
• Choose 6 characters related to your brand
• Select the message type: Promotional / Transactional / Service Implicit / Service Explicit
4. Get Approval
Once submitted, your request will be reviewed. If approved, your header becomes active.
5. Register Message Templates
You must create and get approval for every SMS content format you plan to send.
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Use Cases of SMS Sender ID (Header)
Here’s how businesses across industries use Sender IDs:
• E-commerce: Order confirmations, delivery updates
• Banks: OTPs, debit/credit alerts
• Hospitals: Appointment reminders, lab results
• Schools/Colleges: Fee notifications, event alerts
• Retail Brands: Offers, coupons, sale alerts
• Logistics: Shipment tracking updates
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Benefits of a Verified Sender ID
• Builds Brand Trust – Instantly recognizable messages
• Regulatory Compliance – Meets TRAI and DLT rules
• Higher Delivery Rates – Especially on DND numbers
• Professionalism – Showcases your business credibility
• Improved Engagement – Better open and response rates
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Claiming Your Sender ID with Core Web Networks
At Core Web Networks, we offer complete support for SMS marketing, including:
• Sender ID (Header) registration
• DLT registration and KYC assistance
• Template creation and approval
• Bulk SMS panel access
• Instant delivery for both transactional and promotional messages
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Conclusion
A Sender ID isn’t just a name—it’s the first impression of your brand in every SMS. With increasing digital fraud and spam, having a verified, brand-aligned SMS header not only ensures compliance but also builds customer trust and engagement.
Whether you’re a startup, enterprise, or service provider, a proper Sender ID is essential for effective communication.
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Need Help with Sender ID Registration?
Let our experts at Core Web Networks guide you through the process. Contact us today and get your Sender ID approved and live within 48 hours!
Visit: www.bulksmsproviderdelhi.in and call 9899098962 