Update (8:15pm): The current issue still exists. We are continuing to investigate and will be updating as new information is gathered.
Update (12:33pm): We have been able to resolve the issue for calls to Sonic hosted toll free numbers. This includes calls into our support lines. Because the current toll free calling issue is spread across multiple providers we have not been able to route around the issue for all numbers. We are still investigating and will continue to update this post.
We have received multiple reports of Sonic customers unable to call some toll free numbers. We are currently investigating which carrier is having the issue as this appears to have effected multiple providers. We will continue to post updates as we investigate.