I need to know which IP address I was using two days ago. Is there any log file in OS X that contains this information?

Update: And Chrome for Mac could store this information somewhere?


2 Answers 2


It's too late for you now, but you can get it to start logging things like this by running…

sudo ipconfig setverbose 1

…at every boot.

Then you can search for "network changed" in the All Messages ASL log stream in /Applications/Utilities/Console.app, or in /var/log/system.log[.#.gz], or in /Library/Logs/CrashReporter/com.apple.networking.IPConfiguration.log.[SomeDateString[.gz]]

  • Could you please add the path to where this gets logged? May 5, 2014 at 20:29

From the possible duplicate:

Your modem/router might keep logs on which IP the DSL was registered to. Usually the modem's logs/UI is accessible by navigating to its IP through your browser.

My modem keeps a firewall log. You may be able to look at your modem to find out source/destination addresses and see it there.

  • IN the logs of my modem-router there are no information about the IP. May 5, 2014 at 22:00

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