I come from the land of windows, where the ipconfig command shows four important pieces of information: IP address, netmask, gateway address, and MAC address.

However, on a Mac, ifconfig only shows IP address and MAC address.

Where can I find the gateway address (e.g. and the netmask (e.g.

2 Answers 2


With ifconfig on OS X you can find netmask :

inet netmask 0xffffff00 broadcast

netmask 0xffffff00 means

And for finding gateway address use arp -a or as geekosaur said use netstat -nr | grep '^default'.


On most Unix-like systems, including OSX, that information comes from netstat -r (r for "route").

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