Website Uptime Monitor
Monitor website availability and server information for any domain
cellsig.com
Uptime & Server Information
Current Status
Observed Changes
| Date | Status | Server |
|---|---|---|
| 9/23/2026, 9:22:46 AM | Active | cloudflare |
| 9/20/2026, 7:24:34 AM | Inactive | Unknown |
| 9/18/2026, 7:31:34 PM | Active | Unknown |
| 9/14/2026, 8:55:48 AM | Active | openresty |
| 9/12/2026, 11:23:15 AM | Inactive | Unknown |
| 9/10/2026, 6:22:20 AM | Active | openresty |
| 5/29/2026, 3:33:18 PM | Active | Unknown |
| 5/27/2026, 5:41:12 PM | Active | Unknown |
| 5/23/2026, 12:19:01 AM | Active | Unknown |
| 5/19/2026, 12:41:23 PM | Active | Unknown |
| 5/17/2026, 12:38:27 PM | Active | Unknown |
| 5/11/2026, 5:42:46 AM | Active | Unknown |
| 4/29/2026, 4:17:43 PM | Active | cloudflare |
| 4/28/2026, 10:36:38 AM | Active | cloudflare |
| 4/26/2026, 6:02:35 PM | Inactive | Unknown |
| 4/6/2026, 6:14:28 AM | Active | openresty |
| 1/28/2026, 8:41:45 AM | Inactive | Unknown |
| 1/25/2026, 11:51:32 PM | Inactive | Unknown |
| 1/16/2026, 10:23:59 PM | Active | openresty |
| 1/6/2026, 10:27:44 AM | Active | openresty |
| 1/3/2026, 4:19:54 PM | Active | openresty |
| 12/30/2025, 11:12:26 AM | Inactive | Unknown |
| 11/21/2025, 2:59:19 PM | Active | openresty |
| 11/6/2025, 3:59:48 PM | Active | openresty |
| 11/3/2025, 11:30:10 PM | Active | cloudflare |
| 10/20/2025, 3:08:51 PM | Active | openresty |
| 10/10/2025, 5:23:30 PM | Active | Unknown |
| 8/22/2025, 8:26:08 AM | Active | openresty |
| 8/2/2025, 8:08:22 PM | Active | cloudflare |
| 7/13/2025, 9:26:27 PM | Active | cloudflare |
| 6/25/2025, 7:22:24 PM | Active | Unknown |
| 6/20/2025, 4:51:10 PM | Inactive | Unknown |
| 5/25/2025, 11:56:03 PM | Active | cloudflare |
| 1/6/2025, 7:28:02 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.