Who called from 6124558960

Picked up. They hung up after 2 seconds.

it's from a software company called Productive Corporation

Voice mail light on.  Checked my messages.  Call from this number.  In the voice mail I heard office noise, then they hit a number on the key pad and hung up.

Network security firm

I missed a call from them. They left no meassage, so I called back. Like FMB said, the company is Productive Corp. Their website id here: www.productivecorp.com.