Outbound and inbound calling with toll-free numbers

Azure Communication Services supports inbound and outbound calling capability with toll-free numbers in many countries or regions. However, there are some common limitations that you should be aware of.

Outbound calling with toll-free numbers

Microsoft provides toll-free telephone numbers that have outbound calling capabilities, but it's important to note that this feature is only provided on a "best-effort" basis. In some countries/regions, toll-free numbers are considered as an "inbound only" service from regulatory perspective. This means, that in some scenarios, the receiving carrier may not allow incoming calls from toll-free telephone numbers. Since Microsoft and our carrier-partners don't have control over other carrier networks, we can't guarantee that outbound calls reach all possible destinations.

Inbound calls to Toll-Free numbers

All of our toll-free numbers have inbound calling capability, but do note that inbound calls to your toll-free numbers are only guaranteed to work if both the Toll-Free number and the caller's phone number are from the same country/region. If a call to your toll-free number originates outside the toll-free number country/region, we can't guarantee the delivery of the call. In most cases, international reachability on our toll-free numbers is supported, but there can be certain international carrier and country/region combinations where we can't guarantee that the call reaches to your Toll-Free number.