Overview
When sending SMS through HighLevel, the system follows a set of rules to determine which Twilio phone number is used as the sender. This ensures messages are sent from the most appropriate number, maintaining consistency and compliance.
TABLE OF CONTENTS
1.If the staff member sending the SMS is listed under the sub-account’s My Staff tab and has a dedicated Twilio number assigned:
➝ The lead will receive the SMS from that assigned Twilio number.(It can be changed manually)
2.Exception: If the assigned Twilio number is SMS-incompatible, the system will fall back to the default outbound number.
3.If user is selecting the number from which he wants to send the messages manually,the system will display the last used number next time.

How to Assign Twilio Numbers to Users
1. Go to Sub-Account Settings > My Staff.
2. Edit the User.
3. Expand the Call & Voicemail Settings.
4. Assign a Twilio phone number to the User.
Learn more about Phone numbers for users / Assign Twilio Numbers to Users
Workflow Settings Option
Inside the Workflow builder, you can also manually choose which number to send SMS from.
When configuring a “Send SMS” step, you’ll see a dropdown for “From Number.”
This is useful when you want workflows to always send from a particular number, regardless of staff assignment or channel number.
Fallback Rules (When No User Number Exists)
If the User logged into HighLevel is not listed in the sub-account, or doesn’t have a LC number assigned, the system will try the following in order:
Channel Number – the first LC number ever used with that contact.
This maintains conversation continuity.
Default Outbound Number – if the channel number has been removed, the system will use the default Twilio number set at the account level.
Checking Which Number Was Used
To confirm the exact Twilio number used in a conversation:
Hover over the SMS message in the conversation view.
Click the three dots (…) > Details.
This will show the Twilio number used to send that SMS.
Related article
SMS still coming from old Twilio number when I got a new one?
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