My brother was a police officer. He said not to give to these "charities" as they are pennies away from being a scam. Seeing as they don't leave a message, they only want "quick" money, not your goodwill.
Got a call from this number. Someone in my house answered the phone and they asked for me specifically but when I got on the phone I heard a man's voice say, "hello". Then quickly hung up. Not sure what this was all about but I'm seeing a lot of complaints coming from this number.