I have started to get several calls a day from short numbers, such as +7021, +7019, +7020, +3000, +5006, +4012, +5011, +6020, etc., this started Dec 16, 2014. Actually, they are more hang-ups than calls, since most times I do not even know they called, only that I missed a call. There is never a voicemail. Once in a while, I have the opportunity to answer (it rang long enough to answer if I chose to) but I have not answered yet (in case a robo spam caller is fishing for a live recipient).
Anyone else experienced this recently? Those are ACTUAL numbers I listed above that show up in the call logs and caller ID, including the + sign. I have blocker apps but the numbers constantly change; but not only that, they are 4 digit numbers. I know caller ID's can be spoofed and such, particularly by VIOP apps but just wanted to see if I'm the only one before possibly doing something about it.