Website Down Checker
See whether a site was up at our last check and when it last went down.
xuexi520.cn
Uptime & Server Information
Current Status
Observed Changes
| Date | Status | Server |
|---|---|---|
| 11/10/2026, 8:29:39 PM | Active | nginx |
| 8/30/2026, 1:40:58 AM | Active | nginx |
| 8/18/2026, 1:19:56 PM | Active | nginx |
| 8/12/2026, 8:30:55 PM | Active | nginx |
| 8/5/2026, 2:06:19 PM | Active | nginx |
| 7/11/2026, 2:48:01 AM | Inactive | Unknown |
| 6/10/2026, 9:42:16 PM | Active | nginx |
| 5/14/2026, 8:34:04 PM | Inactive | Unknown |
| 4/27/2026, 10:10:18 AM | Inactive | Unknown |
| 4/23/2026, 4:51:42 PM | Active | nginx |
| 4/10/2026, 5:37:17 AM | Active | nginx |
| 3/30/2026, 12:52:21 PM | Inactive | Unknown |
| 3/16/2026, 11:33:55 PM | Inactive | Unknown |
| 2/19/2026, 3:00:46 AM | Active | nginx |
| 2/7/2026, 12:09:26 PM | Inactive | Unknown |
| 2/4/2026, 12:02:02 PM | Inactive | Unknown |
| 1/30/2026, 4:30:27 AM | Inactive | Unknown |
| 1/24/2026, 8:29:17 PM | Inactive | Unknown |
| 1/18/2026, 4:55:10 AM | Active | nginx |
| 1/5/2026, 4:37:20 AM | Inactive | Unknown |
| 12/2/2025, 5:56:49 AM | Active | nginx |
| 11/19/2025, 3:29:04 AM | Active | nginx |
| 11/14/2025, 6:26:45 AM | Active | nginx |
| 11/10/2025, 4:36:30 PM | Active | nginx |
| 11/7/2025, 5:26:59 AM | Active | nginx |
| 11/5/2025, 11:29:42 AM | Active | nginx |
| 11/1/2025, 9:40:18 AM | Active | nginx |
| 10/20/2025, 4:56:13 AM | Active | nginx |
| 10/7/2025, 8:21:40 AM | Active | nginx |
| 10/1/2025, 12:27:04 PM | Active | nginx |
| 9/23/2025, 10:51:20 AM | Active | nginx |
| 9/13/2025, 7:28:19 AM | Active | nginx |
| 9/1/2025, 6:17:50 AM | Active | nginx |
| 8/26/2025, 6:32:17 AM | Active | nginx |
| 8/23/2025, 2:01:20 AM | Active | nginx |
| 8/21/2025, 5:53:25 PM | Active | nginx |
| 8/20/2025, 5:45:09 PM | Active | nginx |
| 8/19/2025, 4:39:20 PM | Active | nginx |
| 8/14/2025, 5:10:13 PM | Inactive | Unknown |
| 8/12/2025, 4:10:31 AM | Active | nginx |
| 7/5/2025, 2:52:42 AM | Active | nginx |
| 6/27/2025, 1:54:42 PM | Active | nginx |
| 6/17/2025, 6:23:29 AM | Active | nginx |
| 6/6/2025, 9:40:29 AM | Active | nginx |
| 5/17/2025, 1:36:10 AM | Active | nginx |
| 4/18/2025, 3:08:25 PM | Active | nginx |
| 4/12/2025, 7:25:43 PM | Active | nginx |
| 4/1/2025, 1:06:51 PM | Active | nginx |
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, CNAME, TXT 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
This page shows whether we could reach a website the last time we checked it. We also keep a record of when it went down and came back, so you can see whether an outage is new or has happened before. For each site we show:
- Website availability and response status
- Server software and configuration
- Meta information including titles and descriptions
- Historical uptime patterns
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.