I have a Samsung 4 (through Verizon). Starting today, I started receiving phone calls from "3458". That's the entire number. I answered it once and got a computerized voice telling me to press 1 to connect the call or 2 for a voice mail. I hung up. It has called me 4 times now. I called Verizon to ask if I can block it (No, it has to be a 10 digit number to block). Their only suggestion is just not to answer the call.

Any suggestions to either block the call or figure out where it might be calling from?

Thanks for any advice/suggestions.