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Best MXToolbox Subnet Calculator Alternatives ranked by AI · updated Aug 2026

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MXToolbox Subnet Calculator is an online utility for determining subnet masks, network ranges, and usable host addresses. It is designed for IT professionals who also use MXToolbox's broader DNS and email diagnostics.

Developer: MXToolbox Price: Free 🎯 mxtoolbox.com/subnetcalculator.aspx
Networking calculator subnetting ip addressing

Top 6 MXToolbox Subnet Calculator alternatives

1

Subnetter

Subnetter

Subnetter is a browser-based IP subnet calculator for network administrators, students, and IT professionals. It calculates subnet masks, network ranges, broadcast addresses,...

Pros

  • Runs in a browser without installation
  • Faster for basic subnet calculations than desktop network suites
  • Useful for learning CIDR, masks, and host ranges

Cons

  • Fewer advanced planning features than dedicated VLSM calculators
  • Less suitable for bulk or automated calculations than command-line tools
  • Limited network-management features beyond subnetting

Free

Alternatives to Subnetter → Visit site
2

SolarWinds Advanced Subnet Calculator

SolarWinds

SolarWinds Advanced Subnet Calculator is a free desktop utility for network administrators planning IPv4 and IPv6 subnets. It supports subnet calculations, address...

Pros

  • More capable for structured subnet planning than Subnetter
  • Supports IPv4 and IPv6 calculations
  • Better suited to repeated professional network-design work

Cons

  • Windows-focused rather than universally browser-based
  • More cumbersome to access than Subnetter for one-off calculations
  • Interface feels dated compared with modern web tools

Free

Alternatives to SolarWinds Advance... → Visit site
3

IPcalc

ipcalc maintainers

IPcalc is an open-source command-line calculator for analyzing IPv4 and IPv6 networks. It is aimed at system administrators and developers who want...

Pros

  • Works well in terminals and automation workflows
  • Supports both IPv4 and IPv6
  • More scriptable than Subnetter

Cons

  • Less approachable for beginners than Subnetter's web interface
  • Requires installation or package-manager access
  • Outputs are less visual than browser calculators

Free, open source

Alternatives to IPcalc → Visit site
4

Subnet-Online

Subnet-Online

Subnet-Online is a web-based collection of subnetting and IP address calculation tools for network learners and administrators. It provides CIDR, subnet mask,...

Pros

  • Covers more subnetting scenarios than a minimal calculator
  • Works directly in a browser like Subnetter
  • Useful for studying subnet masks and CIDR notation

Cons

  • Interface is less polished than major commercial tools
  • Some pages are more cluttered than Subnetter
  • Limited automation and export capabilities

Free

Alternatives to Subnet-Online → Visit site
5

Calculator.net Subnet Calculator

Calculator.net

Calculator.net Subnet Calculator is a straightforward online tool for calculating IPv4 subnet details from an address and mask. It is aimed at...

Pros

  • Very quick for basic IPv4 subnet calculations
  • Clear results for network, broadcast, and host ranges
  • No account or installation is required

Cons

  • Less comprehensive than Subnetter for advanced subnetting tasks
  • Primarily focused on IPv4
  • Limited support for VLSM and network planning

Free

Alternatives to Calculator.net Sub... → Visit site
6

CIDR.xyz

CIDR.xyz

CIDR.xyz is a visual web-based CIDR and subnet calculator for understanding how IP address blocks divide into networks and hosts. It is...

Pros

  • More visual and educational than Subnetter
  • Helps explain CIDR block boundaries and address allocation
  • Runs instantly in a browser

Cons

  • Less suitable for advanced VLSM planning than SolarWinds
  • Not intended for enterprise network management
  • May provide fewer conventional output fields than Subnetter

Free

Alternatives to CIDR.xyz → Visit site

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