SMS Sender ID — Customizing the Sender
The Sender ID (sender identifier) replaces the phone number with your brand name in the "From:" line of the received SMS.
Technical specifications
- Length: 3 to 11 characters maximum
- Allowed characters: A-Z, a-z, 0-9, space (some carriers exclude the space)
- Must start with a letter (not a digit)
- No special characters: @, #, $, %, &, !, etc.
- Encoding: GSM 7-bit required
Valid examples
✓ WebTic (7 chars) ✓ MyCompanyName (14 chars → too long, will be truncated) ✓ ALERT (5 chars) ✗ 12345 (starts with a digit) ✗ My@Co (special character @)
Geographic compatibility
| Region | Support | Note |
|---|---|---|
| France, EU, United Kingdom | ✓ Supported | Validation within 24-48h |
| Australia, Singapore, UAE | ✓ Supported | Registration required |
| Asia-Pacific | ✓ Mostly | Varies by carrier |
| United States, Canada | ✗ Not supported | Use 10DLC or shortcode |
| Mexico, Brazil | ⚠ Restricted | Pre-registration mandatory |
Alternatives for USA/Canada
- 10DLC (10-Digit Long Code): standard 10-digit number, low cost, ideal for volume
- Shortcode: 5-6 digits (e.g., 84726), high cost ($500-1000+/month), very high throughput
- Toll-free number: prefix 800/833/844/855/866/877/888, good for compliance
How to activate your WebTic Sender ID
- Log in to your WebTic client area → SMS Business service
- Open a support ticket with: desired Sender ID name, supporting document (KBIS or official extract)
- Our team submits the request to the carriers (turnaround: 24-72h for the EU)
- Once validated, use the
"from": "YourSenderID"parameter in your API calls
Important: A custom Sender ID cannot receive replies (one-way). For two-way exchanges, use a long number.
