Who called from 4085983916

This is a spam marketing call by a company named ZScaler.  If you manage to get on their list, they will call endlessly and hang up on your voicemail.

This is a spam telemarketer call

Zscaler is a company who makes web content filtering appliances. They are not a spammer, nor a marketing company. If you're getting a call from them, then you are likely already a customer of theirs.