Over the last couple of weeks I've had maybe a half dozen people who have been returning a missed call from me.  They all seem to be genuine people who are doing this; I'm quite sure they are trying to scam me in any way.

The thing is, I haven't called any of them but they have evidently received a call that appears to come from my number.  I've exchanged texts with the last one to call me, and he/she has received three similar calls over the last week, from three different numbers.

Is this a new way for scammers and cold-callers to get around people who don't answer calls with no CLID or an overseas CLID?  I haven't contacted Spark about it (I'm a Spark mobile customer) because I can predict the response - presumably this is a hack that is outside their control.  

Has anyone else seen this or know anything that can be done?  Presumably they're just selecting random numbers for this, because mine isn't on any websites or similar