$ ifconfig
without arguments, or with one argument (interface you want)killasmurf86 % ifconfig rl0
rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=8<VLAN_MTU>
ether 00:50:8d:e7:8d:d7
inet 192.168.128.100 netmask 0xffffff00 broadcast 192.168.128.255
inet 192.168.128.98 netmask 0xffffff00 broadcast 192.168.128.255
inet 192.168.128.99 netmask 0xffffffff broadcast 192.168.128.99
inet 192.168.128.96 netmask 0xffffffff broadcast 192.168.128.96
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active