no message, just a hang up

I received 4 calls in a row from this number and when I answered the "gentleman" on the line preceeded to verbally assult, yelling and making all kinds of rude comments.

Call to my business registers as "Unavailable". One minute later, my cellphone rings. I do not answer unknown numbers (469-385-7855), and there is no message. Just a hang-up.

Probably a B2B collection agency.

i had been receiving calls from this number for a little over a week.  i do not have an answering machine so they were unable to leave a message.  i finally took the call and i'm glad i did because they were able to work with me and keep me from being sued.