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IP Subnet Calculator - Free IPv4 & IPv6 Subnetting Tool | SEOpeck

Calculate subnets, IP ranges, and network masks instantly with SEOpeck’s free IP Subnet Calculator. Perfect for network engineers, IT pros, and developers.


IP Subnet Calculator - Free IPv4 & IPv6 Subnetting Tool | SEOpeck

The IP Subnet Calculator Tool by SEOpeck is a free, browser-based utility that helps you calculate subnet information for any IPv4 or IPv6 address.
It automatically determines key network details such as:

  • Network address
  • Broadcast address
  • Subnet mask
  • CIDR notation
  • Total hosts and usable hosts per subnet
  • IP range (first and last host)

Whether you’re setting up routers, designing subnets, or managing large network infrastructures, this tool simplifies subnetting calculations and ensures accurate results in seconds.
Key Features:

  • ⚡ Instant subnet calculations for IPv4 & IPv6
  • 🧮 Shows network address, mask, and range
  • 🧠 Calculates number of usable hosts per subnet
  • 🌐 Converts between CIDR and subnet mask formats
  • 🔒 100% secure — no data stored or shared
  • 💼 Ideal for system admins, network engineers & IT students

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