(SUBNET CALCULATOR)
https://www.calculator.net/ip-subnet-calculator.html
(CLASS C SUBNET)
Bits Mask Usable Hosts
/24 255.255.255.000 254
/25 255.255.255.128 126
/26 255.255.255.192 62
/27 255.255.255.224 30
/28 255.255.255.240 14
/29 255.255.255.248 6
/30 255.255.255.252 1
(CLASS B SUBNET)
Bits Mask Usable Hosts
/16 255.255.0.0 65,534
/17 255.255.128.0 32,766
/18 255.255.192.0 16,382
/19 255.255.224.0 8,190
/20 255.255.240.0 4,094
/21 255.255.248.0 2,046
/22 255.255.252.0 1,022
/23 255.255.254.0 510
(CLASS A SUBNET)
Bits Mask Usable Hosts
/8 255.0.0.0 16,777,214
/9 255.128.0.0 8,388,606
/10 255.192.0.0 4,194,302
/11 255.224.0.0 2,097,150
/12 255.240.0.0 1,048,574
/13 255.248.0.0 524,286
/14 255.252.0.0 262,142
/15 255.254.0.0 131,070