Doubt in subnet mask and subnetting

I have ip address 192.168.1.1 and the subnet mask i want to use in 255.255.240.0
that means
ip- 11000000.10101000.00000001.00000001
mask-11111111.11111111.11110000.00000000

here total no of
n/w ids 2^4= 16-2 = 14
host ids 2^12=4096-2 = 4094

is this correct??

the host ids is correct, but the n/w ids is not.
coz you needn't to minus 2 after calculate 2^4.
the subnet u can use is from
192.168.0.0 --> 11000000.10101000.00000000.00000000
192.168.16.0 --> 11000000.10101000.00010000.00000000
192.168.32.0 --> 11000000.10101000.00100000.00000000
192.168.48.0 --> 11000000.10101000.00110000.00000000
192.168.64.0 --> 11000000.10101000.01000000.00000000
192.168.80.0 --> 11000000.10101000.010100000.00000000
192.168.96.0 --> 11000000.10101000.01100000.00000000
192.168.112.0 --> 11000000.10101000.01110000.00000000
.............
192.168.224.0 --> 11000000.10101000.11100000.00000000
every time your subnet id plus 1 then u change to the next subnet.

hope this can help u!

[ 19 May 2003: Message edited by: proxy ]