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IPv4/IPv6 Subnet Calculator

Calculate subnet details for both IPv4 and IPv6 networks

Subnet Calculator

Subnet Information
Calculadora de Subredes
Ingrese una notación CIDR (ej. 192.168.1.0/24) y haga clic en Calcular para ver la información de la subred

About Subnet Calculation

What is a Subnet Calculator?

A subnet calculator is a network tool that helps network administrators and IT professionals calculate various aspects of subnetting and IP addressing. It converts CIDR notation (Classless Inter-Domain Routing) into subnet mask, network address, broadcast address, and range of usable IP addresses.

How to Use This Subnet Calculator

  1. Enter an IP address with CIDR notation (e.g., 192.168.1.0/24 or 2001:db8::/64)
  2. Click the "Calculate" button
  3. View the detailed subnet information including network address, broadcast address, usable IP range, and more

Common IPv4 Subnet Masks and Their CIDR Equivalents

CIDR Subnet Mask Total IPs
/24255.255.255.0256
/25255.255.255.128128
/26255.255.255.19264
/27255.255.255.22432
/28255.255.255.24016
/29255.255.255.2488
/30255.255.255.2524