Finding a phone number from a voicemail

[amikulskis]

We had a voicemail left on our phones (model #8951) when the phones were forwarded to voicemail at night. Is there a way to see what number that voicemail came from?

[amikulskis]

Sorry the model # is 8851 not 8951!

[Leo Laohoo]

Every call manager, regardless if it is CUCM/CUE or Asterisk-based, have CDR.  

If you have the exact time, date and the duration of the call, the CDR will be able to determine the CID.  

NOTE:  Provided the number is not spoofed.