I went through our phone bill and there are some numbers not recognized. What sites do you reccommend for checking who the number belongs to? I have found several phone numbers I don't recognize that are from out of state and even the country. How can I find out who they belong to. I called one-a woman answered and I hung up. I didn't know what to say. I blocked my number using *67. Any advice on how I can do this. I used a reverse look up app on my phone it doesn't seem accurate or work on Canadian numbers. Thank you so much.