Impossible to block unwanted callers, they just spoof the numbers and call again and again and again. When you don't recognize the call and not answer, they leave a robo-message. There is no way to avoid these calls. I am almost at the point of hanging up my land line for good.
Thank you for reaching out! I will recommend submitting your phone number to the National Do Not Call List here to help reduce the number of unwanted calls from telemarketers. You can also set up Anonymous Call Blocking by activating it on your phone by pressing *77. You can find more details on our phone features here.
Tony | Community Mod.
You assume the poster is not already on the National Do Not Call list, and overseas callers do not care, anyway. Anonymous Call Blocking wouldn't work, either, since the poster pointed out a number (albeit a spoofed one) shows up on caller ID.