0161505

Over the past three days I have kept receiving calls from different numbers starting with 0161 505. Each time the last four digits of the number are different. I have kept blocking each one as they come in but as they use a slightly different number every time, I can’t keep up with it! Why would they use a different number each time? I answered once, the person seemed to know my name, but when I asked them to,email me instead they said they couldn’t correspond via that method.