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Q & A IP & Network · September 11, 2026

How do I split a /24 into four subnets?

Add 2 bits to the prefix: /24 becomes /26. Each /26 covers 64 addresses (62 usable). For 192.168.1.0/24 the four subnets are 192.168.1.0/26, 192.168.1.64/26, 192.168.1.128/26, and 192.168.1.192/26.

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CIDR Subnet Math Explained: /24, /16, /8, and Everything Between
CIDR notation is how modern networks are described: an IP address plus a slash and a number counting the network-prefix bits. Everything left of the boundary is the network; everything right is the host. The math is simpler than the notation makes it look.
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