Website Uptime Monitor
Monitor website availability and server information for any domain
21cbi.systems
Uptime & Server Information
Current Status
Historical Data
| Date | Status | Server |
|---|---|---|
| 8/4/2026, 12:20:28 PM | Active | cloudflare |
| 7/3/2026, 2:40:05 AM | Active | cloudflare |
| 6/23/2026, 2:13:18 AM | Active | cloudflare |
| 6/16/2026, 11:44:00 AM | Active | cloudflare |
| 6/14/2026, 6:32:11 PM | Active | cloudflare |
| 6/2/2026, 3:11:37 PM | Active | cloudflare |
| 5/27/2026, 1:28:14 AM | Active | cloudflare |
| 5/20/2026, 2:24:19 AM | Active | cloudflare |
| 5/11/2026, 6:18:21 AM | Active | cloudflare |
| 5/1/2026, 11:02:23 AM | Active | cloudflare |
| 4/17/2026, 9:48:50 PM | Active | cloudflare |
| 4/10/2026, 12:52:39 AM | Active | cloudflare |
| 3/12/2026, 7:54:47 AM | Inactive | Unknown |
| 2/21/2026, 11:41:01 PM | Active | cloudflare |
| 1/27/2026, 11:15:33 AM | Active | cloudflare |
| 1/25/2026, 12:45:53 AM | Inactive | Unknown |
| 1/12/2026, 6:06:12 AM | Inactive | Unknown |
| 1/6/2026, 8:15:18 AM | Inactive | Unknown |
| 1/4/2026, 12:29:02 PM | Inactive | Unknown |
| 1/3/2026, 3:10:52 AM | Inactive | Unknown |
| 1/2/2026, 2:54:10 AM | Inactive | Unknown |
| 12/24/2025, 4:12:13 PM | Inactive | Unknown |
| 12/23/2025, 8:27:06 AM | Inactive | Unknown |
| 12/7/2025, 12:17:58 AM | Inactive | Unknown |
| 12/2/2025, 12:49:50 PM | Inactive | Unknown |
| 11/15/2025, 7:36:29 PM | Inactive | Unknown |
| 11/8/2025, 12:13:40 PM | Inactive | Unknown |
| 11/6/2025, 3:23:33 AM | Inactive | Unknown |
| 11/4/2025, 8:08:48 AM | Inactive | Unknown |
| 11/3/2025, 8:00:08 AM | Inactive | Unknown |
| 10/5/2025, 1:36:18 AM | Inactive | Unknown |
| 10/3/2025, 3:58:12 PM | Inactive | Unknown |
| 9/24/2025, 6:45:20 PM | Inactive | Unknown |
| 9/23/2025, 7:02:47 AM | Inactive | Unknown |
| 9/14/2025, 8:32:18 PM | Inactive | Unknown |
| 9/11/2025, 5:41:13 AM | Inactive | Unknown |
| 8/26/2025, 4:57:26 AM | Inactive | Unknown |
| 8/19/2025, 2:27:41 PM | Inactive | Unknown |
| 8/8/2025, 12:19:36 AM | Inactive | Unknown |
| 8/1/2025, 5:06:35 AM | Inactive | Unknown |
| 7/28/2025, 11:35:28 AM | Inactive | Unknown |
| 7/11/2025, 12:13:02 PM | Inactive | Unknown |
| 7/1/2025, 6:40:01 AM | Inactive | Unknown |
| 6/28/2025, 12:05:47 PM | Inactive | Unknown |
| 6/21/2025, 5:07:20 AM | Inactive | Unknown |
| 6/18/2025, 11:14:07 AM | Inactive | Unknown |
| 6/11/2025, 5:40:27 AM | Inactive | Unknown |
| 5/8/2025, 12:21:02 PM | Inactive | Unknown |
| 4/19/2025, 2:02:10 PM | Inactive | Unknown |
| 3/24/2025, 4:15:43 PM | Inactive | Unknown |
| 3/23/2025, 5:24:05 AM | Inactive | Unknown |
| 2/15/2025, 12:19:53 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.
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.