IPv4 Subnet Calculator

Instant results as you type — optimized for mobile.

Inputs

IPv4 address

IPv4

Format: a.b.c.d where each is 0–255

Subnet mask (CIDR prefix)

Enter a number from 0 to 32 (e.g., 24)

CIDR

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Subnet mask

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Wildcard mask

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Network address

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Broadcast address

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First host

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Last host

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Usable hosts

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Total addresses

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IP (binary)

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Subnet mask (binary)

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Class

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Type

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