Today was the first time I received this call. It was "Name Not Found" but the phone number showed. The caller whistled 4 notes and disconnected. That is the oddest message I have ever received ! I have now blocked the number so after one ring they will be automatically disconnected.
They keep calling never leave a message wish they would stop as don't want to pay phone company to get a service to block a bad number that no one answers when you return call
I got a call from this number today. It's some kind of scam, aimed at Spanish speakers. They tried to tell me they were from the "local phone company" offering me a pre-paid card with minutes for long distance calls as a loyalty measure. It smelled fishy and I pressed him to specify what specific company he was from, and he hung up on me.