Not getting recipientextensionNumber

Using the “get Company Call Records” and not seeing recipientextensionNumber.  We are attempting to filter calls that route through the AutoReceptionist, then through a user with a specific firstName description.  We want to then “marry” all call legs associated with that single call and then take that session ID and pull that call log into a separate bucket.   We have many different sites in our RingCentral tenant that all have different work hours, so we want to “tag” a call by using a User that has AFTERHOURS in its firstName. Very new to the API world...