Prerequisites
- A Telnyx account in verified status
- A messaging profile configured in Mission Control
Setting up a short code
1
Request a short code
Navigate to Short Code in Mission Control and submit your short code request. You can request a random short code (carrier-assigned) or a vanity code (a memorable number you choose, subject to availability).
2
Complete carrier certification
Once submitted, your short code campaign goes through carrier certification with the major US carriers. This process typically takes 8-12 weeks.
3
Start messaging
After approval, your short code appears under the messaging profile you specified. You can send and receive messages just like you would with long codes.
Automated responses
Telnyx sends automated responses from short codes to pass carrier certification tests and handle opt-out requests.Trigger keywords
Automated responses are generated when the short code receives:| Keyword | Purpose |
|---|---|
| KEYWORD | Campaign-specific keyword response |
| HELP | Provides help information |
| STOP (and similar) | Confirms opt-out |
Customizing automated responses
After carrier certification is complete, you can disable automated responses for KEYWORD and HELP to handle them yourself. Contact [email protected] to make this change.Opt-out (STOP) responses cannot be disabled. Once a user opts out, they are blocked from receiving messages, which prevents you from sending a custom response.