/net::calc

Subnet Calculator • IP Converter • Network Tools

Subnet Calculator

IP Address

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CIDR Prefix Length

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Results

Network Address

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Broadcast Address

—

First Usable Host

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Last Usable Host

—

Subnet Mask

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Wildcard Mask

—

Total Addresses

—

Usable Hosts

—

Network Class

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CIDR Notation

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Binary Breakdown

Network bits Host bits

Network / Host Calculator

Given an IP address and subnet mask, find the network address, host portion, and broadcast address.

IP Address

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Subnet Mask

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Results

Network Address

—

Broadcast Address

—

Host / Node Portion

—

CIDR Notation

—

First Usable Host

—

Last Usable Host

—

Usable Hosts

—

Wildcard Mask

—

IP Address Converter

Convert between dotted-decimal, binary, hexadecimal, and integer formats. Just type in any field.

Dotted Decimal

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Binary

Hexadecimal

Integer (32-bit)

Subnet Mask ↔ CIDR Converter

Dotted Decimal Mask

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CIDR Bits

Quick Reference

CIDR	Mask	Addresses	Usable

Wildcard Mask Calculator

Convert between subnet masks and wildcard (inverse) masks. Useful for ACLs on Cisco/network gear.

Subnet Mask

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Wildcard Mask

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