Tutorials: Networking: Subnetting:

Subnet Table

Subnetting Table

Powers of 2 (# of bits to borrow)	27	26	25	24	23	22	21	20
Subnet Mask Decimal Value	128	64	32	16	8	4	2	1
128	1	0	0	0	0	0	0	0
192	1	1	0	0	0	0	0	0
224	1	1	1	0	0	0	0	0
240	1	1	1	1	0	0	0	0
248	1	1	1	1	1	0	0	0
252	1	1	1	1	1	1	0	0
254	1	1	1	1	1	1	1	0
255	1	1	1	1	1	1	1	1