Got a call from this number over dinner hour...
Dallas Texas
When I answered, no one came on

Number called three times in a row with no messages.

I got a call from this number. In my case, it was the customer service center (likely outsourced) for Salesforce.com. Salesforce is a leader in the CRM space. So if you have a customer service or tech support question in to Salesforce, it could be them trying to reach you to help you.