Something

danb@danb-laptop:~$ ipcalc 10.1.1.0/24
Address:   10.1.1.0             00001010.00000001.00000001. 00000000
Netmask:   255.255.255.0 = 24   11111111.11111111.11111111. 00000000
Wildcard:  0.0.0.255            00000000.00000000.00000000. 11111111
=>
Network:   10.1.1.0/24          00001010.00000001.00000001. 00000000
HostMin:   10.1.1.1             00001010.00000001.00000001. 00000001
HostMax:   10.1.1.254           00001010.00000001.00000001. 11111110
Broadcast: 10.1.1.255           00001010.00000001.00000001. 11111111
Hosts/Net: 254                   Class A, Private Internet

danb@danb-laptop:~$ ipcalc 10.1.1.0 255.255.255.240
Address:   10.1.1.0             00001010.00000001.00000001.0000 0000
Netmask:   255.255.255.240 = 28 11111111.11111111.11111111.1111 0000
Wildcard:  0.0.0.15             00000000.00000000.00000000.0000 1111
=>
Network:   10.1.1.0/28          00001010.00000001.00000001.0000 0000
HostMin:   10.1.1.1             00001010.00000001.00000001.0000 0001
HostMax:   10.1.1.14            00001010.00000001.00000001.0000 1110
Broadcast: 10.1.1.15            00001010.00000001.00000001.0000 1111
Hosts/Net: 14                    Class A, Private Internet

danb@danb-laptop:~$