using findstr to output

The other day I used a command that worked fine, but its output required me to do some hands-on work in Excel to get exactly the output I wanted to copy/paste into an email.

Here was the command (sample IP)...

ping -a 10.10.10.10 | findstr /i "Pinging" >> .\hostnames.txt

I am looking for a way to grep or findstr only the hostname. Do you know if I can do this simply using the old CMD tools?

Thanks!
JohnD