Domain Sentinel watches your domain name across .com, .net, .io, .fr and a dozen more, and emails you when a variant is registered or freed.
You own the .com. A competitor, a squatter or a phisher registers the .net, the .io or your country extension, points it at a copy of your site, and starts collecting your customers' logins or your leads.
Checking a dozen extensions by hand every week does not scale. And the variant you want for yourself never becomes available exactly when you happen to look.
Add your main domain
Turn on extension watching. We derive the variants from a curated list of popular TLDs, and you can add up to 10 extensions of your own.
Every variant becomes a monitored domain
Each variant inherits your domain's settings and gets the same nightly registry check, with its own status view in your watchlist.
Get alerted on registrations and drops
When a variant is registered, expires or becomes available, you get an email the next morning. No manual checking.
Free account. Curated TLD list included, plus up to 10 custom extensions per domain.
Create your free account