“shindy, it’s very easy to block the caller ID. That’s the first thing kids do when making prank calls. “
You can also have something on your phone line that prevents people to call you with a blocked caller ID. In order to call your line they have to first dial *82 or something like that before punching in your number, or your phone line will not accept the call. Either way you win. They cannot call you at all, or they MUST identify themselves.
It could be kids, true, but it could also be some pervert who gets her jollies from this type of call. OR, it could be that you should take this at face value, and it might be a kallah who has no female she can talk to, and is therefore calling different woemn hoping to get some help. In any case, if it is simply a stupid prank, find out who it is, and threaten to call the police. We once were getting annoying calls late at night (not of this nature), and after a couple of nights of this, we answered the phone, and my late father O”H made a clicking sound on the phone and then said in a different and very gruff voice, ” OK, Mahoney, we almost got the call traced! We only need them to call one more time and we will have their address in the system! We can arrest them on the next call!” We never got another call again. I was only a teenager then, but I still remember this.