Missed a call from an unknown number. When I call back the line doesn't even ring?

I have an iPhone and I couldn't find this anywhere on the internet. Why the hell did someone call me 3 times today and when I called them back the line doesn't ring once and there's just silence and then it says "call ended" on my phone and the call ends. I tried calling back on my house phone and the line doesn't ring at all but it's just silent the entire time until I hang up. Is it some kind of telemarketer? I've never received telemarketer calls on my iPhone. I've always had them blocked.

There's a scam where the caller hangs up leaving no number showing. When you try to call back the call goes through and expensive exchange, charging you excessively on your phone bill. The call usually goes to some foreign country. You can't get out of it, just like making any toll call. They do this countless times and the few call-backs fill their pockets. I hope you have lost your curiosity enough now to leave that sleeping dog to lie, rather than getting bitten in the wallet.

Creepy

Sounds more like a prankster. He's probably spoofing caller ID to hide his identity. I read about how it works at Callercenter. By using an app, the caller is able to fake the number that appears on your phone. Next time you get a call like that, ignore. Never call back.

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