Website Uptime Monitor
Monitor website availability and server information for any domain
tu-dortmund.de
Uptime & Server Information
Current Status
Historical Data
| Date | Status | Server |
|---|---|---|
| 7/22/2026, 9:26:13 AM | Active | Apache |
| 5/6/2026, 10:18:48 PM | Inactive | Unknown |
| 4/12/2026, 5:07:34 PM | Active | Apache |
| 2/22/2026, 4:49:58 AM | Inactive | Unknown |
| 2/17/2026, 4:38:57 PM | Inactive | Unknown |
| 2/1/2026, 12:50:59 AM | Inactive | Unknown |
| 1/25/2026, 4:52:49 PM | Inactive | Unknown |
| 1/19/2026, 7:22:34 AM | Inactive | Unknown |
| 1/15/2026, 3:34:35 PM | Inactive | Unknown |
| 1/3/2026, 9:05:06 PM | Inactive | Unknown |
| 12/22/2025, 5:19:13 AM | Inactive | Unknown |
| 12/19/2025, 8:26:59 PM | Inactive | Unknown |
| 12/4/2025, 5:39:17 AM | Active | Apache |
| 11/10/2025, 5:28:34 PM | Active | Apache |
| 5/1/2025, 6:14:50 PM | Active | Unknown |
| 4/22/2025, 10:28:48 AM | Active | Unknown |
| 4/7/2025, 8:24:28 AM | Active | Unknown |
| 2/20/2025, 9:12:04 PM | Active | Unknown |
Don't just check uptime once — watch it 24/7
This is a one-time check. Turn on monitoring and we'll watch the domains that matter to you continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
Free for your first domain: uptime, DNS, and certificate together. No credit card.
About Website Uptime Monitoring
Use the Who.is uptime information to track the availability and server information of websites. This helps track:
- Website availability and response status
- Server software and configuration
- Meta information including titles and descriptions
- Historical uptime patterns
This information is valuable for website owners, system administrators, and anyone interested in monitoring website reliability and performance.
Metrics we monitor
- Uptime percentage: The percentage of time your website is accessible
- Response time: How quickly your server responds to requests
- Status codes: HTTP response codes indicating server status
Disclaimer: Who.is is not affiliated with, endorsed by, or connected to any of the domains displayed on this page. We provide this information as a public service for informational purposes only.