Have had several calls from a number starting (02)7259 over the last two days. I don't know anyone in (02) area. The last 4 digits varied and were: 0447, 0837, 0735, 0535, 0429. I answered the first call (0429), hesitated before I said hello, then an Asian voice said my first name (my formal one, not the one friends use) and I hung up. Did not answer the next 5 calls.