You can drill down into the source information and see the IP addresses of a source only under certain circumstances. We only provide this information for Unknown Sources and for Assets that are failing DMARC validation. 

Unknown sources are sources that OnDMARC does not recognize and are not in the list of known Assets. Unknown sources can also be identified in the reports by  looking at the Type column of the Senders list and they are represented by the following icon. 

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