How would I add phone number extensions to the click-to-call settings?

I am hoping to include click-to-call buttons w/ icons for staff, but since they all share a general phone line, I will need to include extensions within the settings (example shown below).
Screenshot 2023-11-20 130818

If anyone can explain how to add both the phone number, and specific extensions to this, I would be appreciative.

I’ve not tried this in Webflow, but usually the protocol would be.


Not all devices will support it, so make certain to display the extension as well, for users who must manually type it in.

If Webflow’s phone input does not allow the special characters ( I haven’t checked ) you might need to set this via script.