The inbound call issue has been resolved by Plivo.

Plivo has implemented a fix for inbound calling and we're currently monitoring the results. Please reach out to support@close.io if you are still experiencing any inbound call issues.

Our Inbound Calling provider, Plivo, is experiencing a platform outage affecting Close Inbound Calls. They are working on resolving these issues. We'll keep you posted on the progress based on status updates to https://status.plivo.com

Outbound calls are working as expected.