Subnet table with Cisco mask

Subnetting table  (Cisco)

 

/ number				Subnet Mask	Block size	Cisco reverse mask
32	24	16	8	255	1	0
31	23	15	7	254	2	1
30	22	14	6	252	4	3
29	21	13	5	248	8	7
28	20	12	4	240	16	15
27	19	11	3	224	32	31
26	18	10	2	192	64	63
25	17	9	1	128	128	127