[outages] Possible Routing Issues to AT&T

Is anyone aware of any routing issues in the AT&T network today that just cleared about 20 minutes ago? I have a customer that was experiencing issues routing to AT&T that was lasting several hours for them. By time I was able To dig into it they called back stating that it cleared so I was unable to get any information to try to locate a root cause of this for them. Thanks! Matthew Anderson