Users may sometimes experience issues when dialing certain toll free numbers from Aircall. This article explains why this happens and how to resolve it.

Symptom

Users are unable to place outbound calls to specific toll free numbers.

Cause

Aircall only supports dialing numbers in E164 format, so Universal Toll Free numbers cannot be called from Aircall.

In addition, in most countries, toll free numbers are designed to receive calls only from within their local region. Many toll free numbers do not accept international inbound calls, which can prevent the call from connecting.

Solution

To ensure successful outbound calls to toll free numbers:

Steps

  1. Dial the toll free number in E164 format.
  2. Confirm that the toll free number is not a Universal Toll Free number.
  3. Place the call from an Aircall number that is local to the toll free number's region.
Tip: If the call still fails, check whether the toll free number accepts calls from the region you are dialing from. Some toll free numbers restrict inbound calls to specific countries.