Netmask			Binary					CIDR	Notes

	255.255.255.255		11111111.11111111.11111111.11111111	/32	1   useable
	255.255.255.254		11111111.11111111.11111111.11111110	/31	0   useable
	255.255.255.252		11111111.11111111.11111111.11111100	/30	2   useable
	255.255.255.248		11111111.11111111.11111111.11111000	/29	6   useable
	255.255.255.240		11111111.11111111.11111111.11110000	/28	14  useable
	255.255.255.224		11111111.11111111.11111111.11100000	/27	30  useable
	255.255.255.192		11111111.11111111.11111111.11000000	/26	62  useable
	255.255.255.128		11111111.11111111.11111111.10000000 	/25	126 useable

	255.255.255.0		11111111.11111111.11111111.00000000	/24	class C

	255.255.254.0		11111111.11111111.11111110.00000000	/23
	255.255.252.0		11111111.11111111.11111100.00000000	/22
	255.255.248.0		11111111.11111111.11111000.00000000	/21
	255.255.240.0		11111111.11111111.11110000.00000000	/20
	255.255.224.0		11111111.11111111.11100000.00000000	/19
	255.255.192.0		11111111.11111111.11000000.00000000	/18
	255.255.128.0		11111111.11111111.10000000.00000000	/17
	255.255.0.0		11111111.11111111.00000000.00000000	/16	class B

	255.254.0.0		11111111.11111110.00000000.00000000	/15
	255.252.0.0		11111111.11111100.00000000.00000000	/14
	255.248.0.0		11111111.11111000.00000000.00000000	/13
	255.240.0.0		11111111.11110000.00000000.00000000	/12
	255.224.0.0		11111111.11100000.00000000.00000000	/11
	255.192.0.0		11111111.11000000.00000000.00000000	/10
	255.128.0.0		11111111.10000000.00000000.00000000	/9
	255.0.0.0		11111111.00000000.00000000.00000000	/8	class A

	254.0.0.0		11111110.00000000.00000000.00000000	/7
	252.0.0.0		11111100.00000000.00000000.00000000	/6
	248.0.0.0		11111000.00000000.00000000.00000000	/5
	240.0.0.0		11110000.00000000.00000000.00000000	/4
	224.0.0.0		11100000.00000000.00000000.00000000	/3
	192.0.0.0		11000000.00000000.00000000.00000000	/2
	128.0.0.0		10000000.00000000.00000000.00000000	/1
	0.0.0.0			00000000.00000000.00000000.00000000	/0