Contact
Questions, corrections, bug reports or feature ideas for any calculator, cheat sheet or guide — all welcome.
Write to hello@itinsighthub.com. We read everything and usually reply within a few business days.
What helps us help you faster
- Bug reports: the page URL, the exact input values you entered, and what you expected vs. what you saw.
- Corrections: the cheat sheet or guide, the specific line or claim, and a source if you have one (RFC, vendor doc, man page).
- Feature requests: the task you're trying to accomplish — that matters more to us than the specific UI you imagine.
Suggestions for new tools or sheets
The roadmap is driven by reader requests. If an IT task makes you reach for a calculator twice a week, tell us about it — chances are others need it too.
For the curious
This site is built and maintained by a small team of network engineers. Every cheat sheet is verified against primary sources — RFCs, vendor documentation and man pages — before publication, and reader corrections are applied fast: most go live within a day or two. If you spot a subnet mask that doesn't match its CIDR or a cron example that wouldn't actually run, that report is genuinely valuable.
No support for third-party products. We can't troubleshoot your company's firewall, Intune tenant or cron jobs in depth, but we're happy to point you at the right reference page on this site.