Website Uptime Monitor
Monitor website availability and server information for any domain
17951.cn
Uptime & Server Information
Current Status
Observed Changes
| Date | Status | Server |
|---|---|---|
| 8/5/2026, 11:09:11 PM | Active | nginx/1.29.3 |
| 7/29/2026, 8:02:18 PM | Active | nginx/1.29.3 |
| 6/28/2026, 6:59:07 AM | Active | nginx/1.27.4 |
| 6/21/2026, 12:12:33 PM | Active | nginx/1.29.3 |
| 6/10/2026, 4:20:35 AM | Active | nginx/1.29.3 |
| 5/16/2026, 1:38:23 PM | Active | nginx/1.29.3 |
| 5/11/2026, 6:41:42 PM | Active | nginx/1.27.4 |
| 5/2/2026, 3:11:04 AM | Active | nginx/1.27.4 |
| 3/29/2026, 8:07:29 AM | Active | nginx/1.29.3 |
| 3/11/2026, 3:23:26 AM | Inactive | Unknown |
| 2/21/2026, 11:32:23 AM | Inactive | Unknown |
| 2/15/2026, 5:09:31 AM | Inactive | Unknown |
| 1/30/2026, 10:46:32 AM | Inactive | Unknown |
| 1/19/2026, 1:12:29 PM | Inactive | Unknown |
| 1/15/2026, 12:11:03 AM | Inactive | Unknown |
| 1/11/2026, 3:35:41 PM | Inactive | Unknown |
| 1/1/2026, 7:46:15 PM | Inactive | Unknown |
| 12/18/2025, 7:07:19 PM | Inactive | Unknown |
| 12/9/2025, 8:22:13 PM | Active | nginx/1.27.4 |
| 12/7/2025, 1:25:26 PM | Active | nginx/1.27.4 |
| 11/26/2025, 12:11:14 PM | Active | nginx/1.29.3 |
| 11/24/2025, 12:30:27 AM | Active | nginx/1.27.4 |
| 11/17/2025, 12:26:18 AM | Active | nginx/1.29.3 |
| 11/9/2025, 3:29:04 AM | Active | nginx/1.29.3 |
| 11/5/2025, 10:27:03 AM | Active | nginx/1.27.4 |
| 9/15/2025, 5:07:21 PM | Active | nginx/1.27.4 |
| 9/11/2025, 10:16:48 AM | Active | nginx/1.27.4 |
| 7/13/2025, 8:56:52 AM | Inactive | 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.
What this page reports
- Last status change: When we last saw a site switch between reachable and unreachable
- Last downtime: When a site was most recently seen down, and whether it has come back
- Server and meta information: The server software, page title and meta tags we last observed
We check a domain at most once a day and record an observation only when something changes, so these are the times a change was seen rather than the exact moment it happened. For continuous, minute-by-minute checks with alerting, use website monitoring.
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.