Which is why nowadays I never take calls if the prefix is from a country I don't have connections with, it is private, or doesn't map to any of my contacts.

If it is someone that I actually know, they will be aware how to actually reach me.

If I remember correctly, a recent Gallup in Sweden indicated that about 25 % do not take calls from any unknown number. I don’t know whether this result has been corrected to take itself into account. :)

There was a time I had a scheduled job interview and got two spam calls from the same area code as the interviewer 2 minutes before. The third time, I hung up on the actual interviewer.