IP address Subnetter

Custom Subnet Mask	Binary Custom Subnet Mask	Bits Borrowed	Usable Subnets	Usable Hosts
255.128.0.0	11111111 10000000 00000000 00000000	1	0	8388606
255.192.0.0	11111111 11000000 00000000 00000000	2	2	4194302
255.224.0.0	11111111 11100000 00000000 00000000	3	6	2097150
255.240.0.0	11111111 11110000 00000000 00000000	4	14	1048574
255.248.0.0	11111111 11111000 00000000 00000000	5	30	524286
255.252.0.0	11111111 11111100 00000000 00000000	6	62	262142
255.254.0.0	11111111 11111110 00000000 00000000	7	126	131070
255.255.0.0	11111111 11111111 00000000 00000000	8	254	65534
255.255.128.0	11111111 11111111 10000000 00000000	9	510	32766
255.255.192.0	11111111 11111111 11000000 00000000	10	1022	16382
255.255.224.0	11111111 11111111 11100000 00000000	11	2046	8190
255.255.240.0	11111111 11111111 11110000 00000000	12	4094	4094
255.255.248.0	11111111 11111111 11111000 00000000	13	8190	2046
255.255.252.0	11111111 11111111 11111100 00000000	14	16382	1022
255.255.254.0	11111111 11111111 11111110 00000000	15	32766	510
255.255.255.0	11111111 11111111 11111111 00000000	16	65534	254
255.255.255.128	11111111 11111111 11111111 10000000	17	131070	126
255.255.255.192	11111111 11111111 11111111 11000000	18	262142	62
255.255.255.224	11111111 11111111 11111111 11100000	19	524286	30
255.255.255.240	11111111 11111111 11111111 11110000	20	1048574	14
255.255.255.248	11111111 11111111 11111111 11111000	21	2097150	6
255.255.255.252	11111111 11111111 11111111 11111100	22	4194302	2
255.255.255.254	11111111 11111111 11111111 11111110	23	8388606	0
255.255.255.255	11111111 11111111 11111111 11111111	24	16777214	0