how do i view the content of iptable "PREROUTING"

[firsttimeuser]

I wrote some rules using

iptables -A PREROUTING x.x.x.x.x

and

iptables -A POSTROUTING X.X.X.X

and iptables -L -vn does not show anything, what is the command to list the rules I just appended into the chains? thanks

[bodhi.zazen]

sudo iptables -L -vt nat

[firsttimeuser]

thanks a lot!