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Best Subnetter Alternatives ranked by AI · updated Aug 2026

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

Developer: Subnetter Price: Free 🎯 subn.dev
Networking calculator subnetting ip addressing

Top 6 Subnetter alternatives

1

SolarWinds Advanced Subnet Calculator

SolarWinds

💡 Pick it for deeper IPv4/IPv6 planning and VLSM work in a dedicated desktop utility.

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
2

IPcalc

ipcalc maintainers

💡 Pick it when you need open-source, scriptable subnet calculations from a terminal.

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
3

Subnet-Online

Subnet-Online

💡 Pick it for a broader set of free browser-based subnetting and IP calculation tools.

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
4

MXToolbox Subnet Calculator

MXToolbox

💡 Pick it if subnet calculations are part of a wider DNS, email, and network-diagnostics workflow.

MXToolbox Subnet Calculator is an online utility for determining subnet masks, network ranges, and usable host addresses. It is designed for IT...

Pros

  • Quick browser-based results comparable to Subnetter
  • Comes from a well-known network diagnostics provider
  • Fits workflows that also involve DNS and email troubleshooting

Cons

  • Less focused on subnetting education than Subnetter
  • Fewer advanced planning features than SolarWinds
  • Advertising can make the page feel busy

Free

Alternatives to MXToolbox Subnet C... → Visit site
5

Calculator.net Subnet Calculator

Calculator.net

💡 Pick it for a familiar, no-frills IPv4 subnet lookup with minimal setup.

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

💡 Pick it when visual CIDR explanations matter more than extensive subnet-planning features.

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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