Tabel Subnet Mask Quick Reference

Mask Length	Host Bit Length	Math	Max Hosts	Subnet Mask	Mask Octet	Binary Mask	Subnet Length
/32	0	2^0	1	255.255.255.255	4	11111111	0
/31	1	2^1	2	255.255.255.254	4	11111110	1
/30	2	2^2	4	255.255.255.252	4	11111100	2
/29	3	2^3	8	255.255.255.248	4	11111000	3
/28	4	2^4	16	255.255.255.240	4	11110000	4
/27	5	2^5	32	255.255.255.224	4	11100000	5
/26	6	2^6	64	255.255.255.192	4	11000000	6
/25	7	2^7	128	255.255.255.128	4	10000000	7
/24	8	2^8	256	255.255.255.0	3	11111111	8
Kelas C
/23	9	2^9	512	255.255.254.0	3	11111110	9
/22	10	2^10	1.024	255.255.252.0	3	11111100	10
/21	11	2^11	2.048	255.255.248.0	3	11111000	11
/20	12	2^12	4.096	255.255.240.0	3	11110000	12
/19	13	2^13	8.192	255.255.224.0	3	11100000	13
/18	14	2^14	16.384	255.255.192.0	3	11000000	14
/17	15	2^15	32.768	255.255.128.0	3	10000000	15
/16	16	2^16	65.536	255.255.0.0	2	11111111	16
Kelas B
/15	17	2^17	131.072	255.254.0.0	2	11111110	17
/14	18	2^18	262.144	255.252.0.0	2	11111100	18
/13	19	2^19	524.288	255.248.0.0	2	11111000	19
/12	20	2^20	1.048.576	255.240.0.0	2	11110000	20
/11	21	2^21	2.097.152	255.224.0.0	2	11100000	21
/10	22	2^22	4.194.304	255.192.0.0	2	11000000	22
/9	23	2^23	8.388.608	255.128.0.0	2	10000000	23
/8	24	2^24	16.777.216	255.0.0.0	1	11111111	24
Kelas A