Website Uptime Monitor
Monitor website availability and server information for any domain
02550.cn
Uptime & Server Information
Current Status
Historical Data
| Date | Status | Server |
|---|---|---|
| 8/12/2026, 4:56:48 AM | Active | Unknown |
| 6/15/2026, 6:12:30 AM | Active | Unknown |
| 6/10/2026, 9:23:03 PM | Active | Unknown |
| 5/31/2026, 7:49:50 AM | Active | Unknown |
| 5/16/2026, 4:44:19 AM | Active | Unknown |
| 4/30/2026, 7:11:28 PM | Active | Unknown |
| 4/25/2026, 12:25:34 AM | Active | Unknown |
| 2/22/2026, 1:59:56 AM | Inactive | Unknown |
| 2/19/2026, 10:01:07 PM | Inactive | Unknown |
| 2/16/2026, 7:49:17 AM | Inactive | Unknown |
| 2/1/2026, 3:14:06 PM | Inactive | Unknown |
| 1/27/2026, 6:59:30 AM | Inactive | Unknown |
| 1/4/2026, 6:28:32 PM | Inactive | Unknown |
| 12/13/2025, 3:50:08 AM | Inactive | Unknown |
| 12/10/2025, 10:12:08 PM | Inactive | Unknown |
| 12/1/2025, 9:22:06 AM | Inactive | Unknown |
| 11/28/2025, 2:23:13 AM | Inactive | Unknown |
| 11/26/2025, 6:07:01 AM | Inactive | Unknown |
| 11/6/2025, 3:05:54 PM | Inactive | Unknown |
| 11/5/2025, 1:46:06 AM | Inactive | Unknown |
| 10/31/2025, 11:49:04 AM | Inactive | Unknown |
| 10/27/2025, 7:23:52 PM | Inactive | Unknown |
| 10/13/2025, 3:09:30 PM | Inactive | Unknown |
| 7/28/2025, 12:02:26 AM | Active | nginx |
| 7/25/2025, 11:01:03 PM | Active | nginx |
| 7/24/2025, 9:15:42 PM | Active | nginx |
| 7/23/2025, 7:33:12 PM | Active | nginx |
| 7/11/2025, 12:31:24 AM | Active | nginx |
| 6/27/2025, 6:11:58 AM | Inactive | Unknown |
| 6/25/2025, 11:31:42 AM | Active | nginx |
| 5/24/2025, 12:47:28 PM | Inactive | Unknown |
| 5/15/2025, 2:23:05 PM | Inactive | Unknown |
| 5/12/2025, 8:59:32 PM | 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.
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.