TABLE 1: CIDR Values and Equivalent Subnet Masks
Address Class	CIDR Value	Subnet Mask
Class A	/8	255.0.0.0
	/9	255.128.0.0
	/10	255.192.0.0
	/11	255.224.0.0
	/12	255.240.0.0
	/13	255.248.0.0
	/14	255.252.0.0
	/15	255.254.0.0
	/16	255.255.0.0
Class B	/17	255.255.128.0
	/18	255.255.192.0
	/19	255.255.224.0
	/20	255.255.240.0
	/21	255.255.248.0
	/22	255.255.252.0
	/23	255.255.254.0
	/24	255.255.255.0
Class C	/25	255.255.255.128
	/26	255.255.255.192
	/27	255.255.255.224
	/28	255.255.255.240
	/29	255.255.255.248
	/30	255.255.255.252
	/31	255.255.255.254
	/32	255.255.255.255