# About ITInsightHub – Network Tools

> ITInsightHub builds network tools: subnet calculators, VLSM planning, CIDR conversion and printable references.

- Page URL: https://itinsighthub.com/about/
- Markdown variant of this page: append `?format=md` to any URL on this site or send `Accept: text/markdown`.
- Full site index for AI assistants: https://itinsighthub.com/llms.txt
- Full site export: https://itinsighthub.com/llms-full.txt

# About ITInsightHub

ITInsightHub is a collection of network engineering tools and references for practical infrastructure work.

## Why we built this

Most online subnet calculators were built in a different era of the web. They hide results behind JavaScript that never renders for search engines and screen readers, they can't share a result as a link, they ignore IPv6 or RFC edge cases, and they bury the answer under advertising.

We think a reference tool should be **fast**, **linkable**, **correct**, and **readable on any device**. Every page here is pre-rendered server-side, every calculation produces a shareable URL, and the math follows the RFCs — including /31 point-to-point links (RFC 3021), /32 host routes, and proper handling of private, CGNAT and documentation ranges.

## What you'll find here

- [IPv4 subnet calculator](https://itinsighthub.com/subnet-calculator/) — network, broadcast, host range, wildcard mask and binary breakdown.
- [IPv6 subnet calculator](https://itinsighthub.com/ipv6-subnet-calculator/) — expand/compress addresses, analyze prefixes.
- [Wildcard mask calculator](https://itinsighthub.com/wildcard-mask-calculator/) — CIDR ⇄ inverse masks for ACLs.
- [IP range to CIDR converter](https://itinsighthub.com/ip-range-to-cidr/) — minimal covering blocks, with batch mode.
- [VLSM calculator](https://itinsighthub.com/vlsm-calculator/) — plan right-sized subnets from host counts.
- [Subnet cheat sheet](https://itinsighthub.com/subnet-cheat-sheet/) — every mask from /0 to /32, printable.
- [Per-mask reference pages](https://itinsighthub.com/subnet/24/) — deep dives for each prefix length.

## How it's built

The entire site runs on [Cloudflare Workers](https://workers.cloudflare.com/) at locations around the world, so pages render close to you in milliseconds. Tools work even with JavaScript disabled; when JavaScript is available, results update live as you type.

## Accuracy policy

All calculations are unit-tested against known-good vectors. If you spot an error anywhere, it will be fixed quickly — accuracy matters more than anything else on this site.

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