Subnet Calculator — IPv4 & IPv6

IP Address / CIDR IPv4 & IPv6

IPv4:

IPv6:

Subnet Information

Network Address

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Broadcast Address

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Subnet Mask

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Wildcard Mask

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First Usable Host

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Last Usable Host

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Usable Hosts

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IP Address (entered)

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Binary Breakdown

IP Address	—
Subnet Mask	—
Network	—
Broadcast	—

Network bits

Host bits

Subnet Splitter

Split into equal subnets

IP Range Checker

Is within this subnet?

VLSM Planner

Enter one host requirement per line with an optional label — e.g. 50 Engineering or just 50. Allocates from —, largest subnet first, using the tightest fitting prefix.

Prefix Information

Network Address

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Last Address

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Entered Address

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Full Expanded Form

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Total Addresses

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Prefix / Address Type

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Address Breakdown (Hex, nibble-level)

IP Address	—
Network	—
Last Address	—

Network nibbles

Boundary nibble

Host nibbles

Subnet Splitter

Split into equal subnets

Address in Range?

Is within this prefix?