I received a phone call from this number. Since I didn't know the number I didn't pick up, no message was left either.

I got a call from this line and then it hung up. I called back and its some company line for Dental Benefits... i talked to someone and they said it was the National Benefits Enrollment Department for 'US Rx card members'

As soon as I answered, they hung up.

One ring, then hang up.

this is a US Dental benefits outfit. SPAM.