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I've got a question, sometimes when the Caller ID is hidden, it will show up on my lock screen as "Anonymous". But recently, I've noticed something, there is a distinction between Anonymous and "Unknown", when missing a call.

Who can tell me what "unknown number" means, I suppose a caller either has the number hidden (anonymous) or shown (just the number that shows up, or a contact)? I also received a voicemail from the unknown number, which is just a 3 second message with a computer voice.

Who can clear this up for me?

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Unknown means the carrier didn't send a CID response. Anonymous means they populated it with the word 'Anonymous'.

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  • Can I assume then that if the carrier doesn't send a CID it is most likely to be something like fake calls?
    – jbehrens94
    Jun 12 '17 at 16:28
  • Of course not. There are any number of legitimate reasons to block CID. Jun 14 '17 at 12:22

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