This was the number displayed for a text-to-voice service. My wife accidentally sent a text to our home number. The text is converted by computer to a voice message.

Silence caller. No idea who called.

Got a call today from (613) 788-5121, when I answered no one spoke.  Tried calling the number back and it's always busy.

I got a call from this number. A male voice with a Chinese accent was asking to talk to Peter. Then he was asking is that the number xxx.xxxx.xxxxx. When I told him that I don't answer this question to unidentified callers he became very rude starting to say: ba ba ba ba ba. So I hung up. What ever they are doing, they have very rude and unpolite callers.

Same call as K.  But I hung up because I do not respond to telemarketing, not because I couldn't use their services.

SAME ! it was weird and creepy!

Text message that followed the missed call from this number was offering unsolicited debt relief

Get several calls from this number everyday. The caller hangs up when I answer.