Class C - (P) Possible / (U) Usable Subnets
Math: (2 ^ n) - 2	2 ^ 7	2 ^ 6	2 ^ 5	2 ^ 4	2 ^ 3	2 ^ 2	2 ^ 1	2 ^ 0	Horizontal Ranges
8-Bit Binary:	128	64	32	16	8	4	2	1	255 / 0 thru 255=256
Bits:	0	0	1	1	1	1	1	1	63 / 0 thru 63 = 64
Host Bits:	-	-	6	-	-	-	-	-	6
Borrowed-bits:	2	-	-	-	-	-	-	-	2
4th Octet Binary:	1	1	0	0	0	0	0	0	192
4th Octet Alpha:	s	s	h	h	h	h	h	h	s: 4 P/2 U | h: 64 P/62 U
Custom Subnet Mask:	11111111.11111111.11111111.11000000								255.255.255.192
Bits:	0	0	0	1	1	1	1	1	31 / 0 thru 31 = 32
Host Bits:	-	-	-	5	-	-	-	-	5
Borrowed-bits:	3	-	-	-	-	-	-	-	3
4th Octet Binary:	1	1	1	0	0	0	0	0	224
4th Octet Alpha:	s	s	s	h	h	h	h	h	s: 8 P/6 U | h: 32 P/30 U
Custom Subnet Mask:	11111111.11111111.11111111.11100000								255.255.255.224
Bits:	0	0	0	0	1	1	1	1	15 / 0 thru 15 = 16
Host Bits:	-	-	-	-	4	-	-	-	4
Borrowed-bits:	4	-	-	-	-	-	-	-	4
4th Octet Binary:	1	1	1	1	0	0	0	0	240
4th Octet Alpha:	s	s	s	s	h	h	h	h	s: 16 P/14 U | h:16 P/14 U
Custom Subnet Mask:	11111111.11111111.11111111.11110000								255.255.255.240
Bits:	0	0	0	0	0	1	1	1	7 / 0 thru 7 = 8
Host Bits:	-	-	-	-	-	3	-	-	3
Borrowed-bits:	5	-	-	-	-	-	-	-	5
4th Octet Binary:	1	1	1	1	1	0	0	0	248
4th Octet Alpha:	s	s	s	s	s	h	h	h	s: 32 P/30 U | h: 8 P/6 U
Custom Subnet Mask:	11111111.11111111.11111111.11111000								255.255.255.248
Bits:	0	0	0	0	0	0	1	1	3 / 0 thru 3 = 4
Host Bits:	-	-	-	-	-	-	2	-	2
Borrowed-bits:	6	-	-	-	-	-	-	-	6
4th Octet Binary:	1	1	1	1	1	1	0	0	252
4th Octet Alpha:	s	s	s	s	s	s	h	h	s: 64 P/62 U | h: 4 P/2 U
Custom Subnet Mask:	11111111.11111111.11111111.11111100								255.255.255.252

Class C Host Bits Summary
Borrowed_Bits	Subnet Mask	Subnets	Hosts	Range
2	255.255.255.192	2	62	64
3	255.255.255.224	6	30	32
4	255.255.255.240	14	14	16
5	255.255.255.248	30	6	8
6	255.255.255.252	62	2	4