[stephenf@limbo nero]$ ipcalc 128.223.177.254/23
Address:   128.223.177.254      10000000.11011111.1011000 1.11111110
Netmask:   255.255.254.0 = 23   11111111.11111111.1111111 0.00000000
Wildcard:  0.0.1.255            00000000.00000000.0000000 1.11111111
=>
Network:   128.223.176.0/23     10000000.11011111.1011000 0.00000000
HostMin:   128.223.176.1        10000000.11011111.1011000 0.00000001
HostMax:   128.223.177.254      10000000.11011111.1011000 1.11111110
Broadcast: 128.223.177.255      10000000.11011111.1011000 1.11111111
Hosts/Net: 510                   Class B