Netmask	/CIDR	Usable	Size
255.255.255.0	/24	254	1 Class C
255.255.255.128	/25	126	128 Hosts
255.255.255.192	/26	62	64 Hosts
255.255.255.224	/27	30	32 Hosts
255.255.255.240	/28	14	16 Hosts
255.255.255.248	/29	6	8 Hosts
255.255.255.252	/30	2	4 Hosts
255.255.255.254	/31	0	2 Hosts
255.255.255.255	/32	1	1 Host