# Subnet Mask Cheat Sheet

> CIDR Calculator & IP Lookup Reference

```yaml
url: "https://www.launchit.site/launches/subnet-mask-cheat-sheet"
website: "https://subnetmaskcheatsheet.com/"
tier: free
upvotes: 1
category: "devtools"
tags: "CIDR Calculator, IP Lookup Reference, Subnet Mask Reference, Easy-to-use interface, Comprehensive networking resources"
maker: "Brian Chan"
logo: "https://lzcylwiwktgrriaqfqvx.supabase.co/storage/v1/object/public/startup-media/1768810959991-logo-file"
launched: "January 19, 2026"
created: 2026-01-19
```

## About Subnet Mask Cheat Sheet

The Subnet Mask Cheat Sheet provides a comprehensive reference for understanding subnet masks and CIDR notation. It includes tools for calculating subnet information and IP address lookups, making it essential for network professionals.

The Subnet Mask Cheat Sheet includes tools for calculating subnet information, such as a VLSM calculator and an IPv4 to IPv6 converter, aiding network professionals in efficient network design and management.

## Overview

## Details

- Category: [devtools](https://www.launchit.site/category/developer-tools)
- Website: https://subnetmaskcheatsheet.com/
- Upvotes on Launchit: 1
- Launched: January 19, 2026
- Tags: #CIDR Calculator · #IP Lookup Reference · #Subnet Mask Reference · #Easy-to-use interface · #Comprehensive networking resources

## Tech stack

- [Node.js](https://www.launchit.site/built-with/nodejs)
- [Next.js](https://www.launchit.site/built-with/nextjs)

## Built by

- [Brian Chan](https://www.launchit.site/profile/brianchan)

## Links

- Website: https://subnetmaskcheatsheet.com/
- Link: https://subnetmaskcheatsheet.com/

## Media

![Subnet Mask Cheat Sheet logo](https://lzcylwiwktgrriaqfqvx.supabase.co/storage/v1/object/public/startup-media/1768810959991-logo-file)

![Subnet Mask Cheat Sheet cover](https://lzcylwiwktgrriaqfqvx.supabase.co/storage/v1/object/public/startup-media/1768810960511-thumbnail-ogimage.png)

![Subnet Mask Cheat Sheet cover 1](https://lzcylwiwktgrriaqfqvx.supabase.co/storage/v1/object/public/startup-media/1768810961002-cover-0-ogimage.png)

![Subnet Mask Cheat Sheet cover 2](https://lzcylwiwktgrriaqfqvx.supabase.co/storage/v1/object/public/startup-media/1768810961567-cover-1-20260119162221.png)

## Explore

- [More in devtools](https://www.launchit.site/category/developer-tools)
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Source: https://www.launchit.site/launches/subnet-mask-cheat-sheet · Launchit — the startup launch directory for indie makers.