Subnet IP Ranges Cheat Sheet by BadSheep

CIDR	Addresses	Wildcard	Mask
/8	16777216	0.255.255.255	255.0.0.0
/9	8388608	0.127.255.255	255.128.0.0
/10	4194304	0.63.255.255	255.192.0.0
/11	2097152	0.31.2­55.255	255.22­4.0.0
/12	1048576	0.15.2­55.255	255.24­0.0.0
/13	524288	0.7.25­5.255	255.24­8.0.0
/14	262144	0.3.25­5.255	255.25­2.0.0
/15	131072	0.1.25­5.255	255.25­4.0.0

CIDR	Addresses	Wildcard	Mask
/16	65536	0.0.255.255	255.255.0.0
/17	32768	0.0.127.255	255.255.128.0
/18	16384	0.0.63.255	255.255.192.0
/19	8192	0.0.31.255	255.25­5.224.0
/20	4096	0.0.15.255	255.25­5.240.0
/21	2048	0.0.7.255	255.25­5.248.0
/22	1024	0.0.3.255	255.25­5.252.0
/23	512	0.0.1.255	255.25­5.254.0

CIDR	Addresses	Wildcard	Mask
/24	256	0.0.0.255	255.255.255.0
/25	128	0.0.0.127	255.255.255.128
/26	64	0.0.0.63	255.25­5.2­55.192
/27	32	0.0.0.31	255.25­5.2­55.224
/28	16	0.0.0.15	255.25­5.2­55.240
/29	8	0.0.0.7	255.25­5.2­55.248
/30	4	0.0.0.3	255.25­5.2­55.252