Who called from 2123803114

It's american express.

On my cell, recorded call "Hello. You have an important message from American Express.."

It's a scam. I called American Express's customer service line to ask if they were calling me for any reason (I don't trust a regular area code). This number is not in their records as being from any of their departments.

Its American Express.

The caller was recordeing and identified themselves as american express and wanted to speak to someone I knew but who was not someone associated with my phone number.