Website Uptime Monitor
Monitor website availability and server information for any domain
rdcdn.cn
Uptime & Server Information
Current Status
Historical Data
| Date | Status | Server |
|---|---|---|
| 7/27/2026, 4:32:25 PM | Active | Unknown |
| 5/16/2026, 12:07:26 AM | Active | Unknown |
| 4/25/2026, 7:01:51 AM | Inactive | Unknown |
| 4/22/2026, 11:28:34 PM | Inactive | Unknown |
| 3/29/2026, 7:01:38 PM | Inactive | Unknown |
| 3/3/2026, 4:22:32 PM | Inactive | Unknown |
| 2/5/2026, 4:50:33 AM | Inactive | Unknown |
| 2/3/2026, 6:43:01 AM | Inactive | Unknown |
| 2/2/2026, 4:43:30 AM | Inactive | Unknown |
| 1/30/2026, 8:40:55 PM | Inactive | Unknown |
| 1/24/2026, 2:04:40 PM | Inactive | Unknown |
| 12/31/2025, 11:51:48 PM | Inactive | Unknown |
| 12/18/2025, 2:12:33 PM | Inactive | Unknown |
| 12/10/2025, 1:28:08 AM | Inactive | Unknown |
| 11/6/2025, 5:38:43 PM | Active | Unknown |
| 7/11/2025, 10:11:53 PM | Active | Unknown |
| 6/26/2025, 2:27:30 AM | Active | Unknown |
| 6/15/2025, 3:51:40 AM | Active | Unknown |
| 6/11/2025, 6:17:59 AM | Active | Unknown |
| 5/26/2025, 6:43:40 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.