I can't ping their server: perhaps it's been switched off.
The network is overloaded from all the pings going out.
My car used to make an odd ping, but after the last oil change it went away.
I sent a ping to the insurance company to see if they received our claim.
I'll ping the insurance company again to see if they've received our claim.
The server pings its affiliates periodically.
The submarine sent out a ping and got an echo from a battleship.