The native Windows Ping command can't record timestamps in the results without a lot of fussing around.
Use PowerShell and bang-out the following command to get timestamps on the ping results (replace COMPUTERNAME with either the Host Name or IP Address).
ping.exe -t COMPUTERNAME|Foreach{"{0} - {1}" -f (Get-Date),$_}
To send your results to a text file, pipe the results by appending the following.
ping.exe -t COMPUTERNAME|Foreach{"{0} - {1}" -f (Get-Date),$_}>c:\temp\pingresults.txt
Use PowerShell and bang-out the following command to get timestamps on the ping results (replace COMPUTERNAME with either the Host Name or IP Address).
ping.exe -t COMPUTERNAME|Foreach{"{0} - {1}" -f (Get-Date),$_}
To send your results to a text file, pipe the results by appending the following.
ping.exe -t COMPUTERNAME|Foreach{"{0} - {1}" -f (Get-Date),$_}>c:\temp\pingresults.txt