Domain expiration monitoring
One missed renewal is all it takes
A client's domain expires, their site goes dark, and their customers land on a parking page. Sentinel watches every domain you manage and makes sure that never happens.
Domain expiration timeline
Auto-tracked
clientsite.com
Namecheap · Expires Apr 22, 2026
shop.acmeco.com
GoDaddy · Expires Mar 28, 2026
portfolio.design
Cloudflare · Expires Mar 19, 2026
app.techstartup.io
Google Domains · Expires Jul 10, 2026
How it works
Automatic domain tracking for every monitor
When you add an uptime monitor for any website, Sentinel automatically queries the domain's WHOIS registration data and begins tracking its expiration date. There is nothing extra to configure. Every domain you monitor is covered from day one.
As the expiration date approaches, Sentinel sends multi-tier alerts at 30, 14, 7, and 1 day before expiry. Each threshold is configurable per monitor, so you can set tighter windows for critical client domains and wider windows for domains with auto-renewal enabled. All domain expiration dates are visible in a centralized dashboard that spans every team and every client site.
- WHOIS data queried automatically for every monitored domain
- Alert thresholds at 30, 14, 7, and 1 day before expiry
- Centralized view across all teams and client sites
Alert thresholds
- First notice
- 30 days before expiry
- Second notice
- 14 days before expiry
- Escalation
- 7 days before expiry
- Final warning
- 1 day before expiry
Every threshold is configurable per monitor, so critical client domains can warn earlier than the ones on auto-renewal.
Features
Everything you need to prevent domain lapses
Multi-tier alerts
Configurable alert thresholds at 30, 14, 7, and 1 day before expiration. Choose which intervals matter for each domain and never be caught off guard.
Centralized dashboard
See every domain expiration date across all your client sites in a single view. Sort by urgency, filter by team, and export for client reporting.
Automatic tracking
No extra setup required. Every uptime monitor automatically checks domain registration expiry alongside uptime, SSL, DNS, ping, TCP port and heartbeat/cron monitoring.
The stakes are high
Why domain monitoring matters
Domain expiration is one of the most preventable yet devastating failures in web operations. When a domain lapses, the consequences cascade quickly and the damage is often irreversible.
30%
of expired domains are snatched by squatters within 24 hours
67%
of users won't return to a site that appeared unavailable
$10K+
average cost to recover a squatted domain through legal action
4x
more likely to lose a client after a preventable domain lapse
Client trust damage
When a client's domain expires on your watch, the conversation that follows is one no agency wants to have. Trust built over months of good work evaporates in a single incident. Clients expect their web presence to be managed, and a lapsed domain signals a fundamental failure in that responsibility.
SEO and traffic loss
Search engines deindex expired domains rapidly. Even a brief lapse can cause months of organic rankings to disappear. Backlinks built over years start returning errors. Recovering search visibility after a domain expiration often takes longer than the original SEO campaign that built those rankings.
Domain squatting risk
Automated bots continuously scan for expiring domains with established traffic and authority. Within hours of expiration, a valuable domain can be registered by a squatter who will either fill it with ads, use it for phishing, or demand a premium to sell it back. The legal process to recover a squatted domain is expensive, slow, and not guaranteed to succeed.
When does Sentinel alert me about a domain expiring?
Domain expiration monitoring alerts you before a domain registration lapses, giving you time to renew it before the site goes dark.
Do I need to set up domain tracking manually?
No. When you add a monitor for a site, Sentinel tracks its domain registration expiry automatically, so every domain you monitor is covered.
How will I receive domain expiration alerts?
Alerts can be delivered via email, SMS, Slack, Discord, and webhooks, so the renewal reminder reaches whoever is responsible.
Can I track expiration dates for all my client domains?
Yes. Sentinel is built for agencies and freelancers, so you can monitor domain expiration across every client site from a single account.
How is this different from SSL certificate monitoring?
Domain expiration monitoring watches when a domain's registration lapses, while SSL monitoring watches when a certificate expires. They are separate check types and you can run both on the same site.
Is there a free trial?
Yes. Paid plans include a 14-day free trial, there is also a free plan, and you can cancel anytime.
Stop worrying about domain renewals
Start monitoring domain expirations across all your client sites today. Multi-tier alerts ensure you always have time to act.
No card for the free plan · 14-day trial on paid plans · Cancel anytime