Website Uptime Monitor
Monitor website availability and server information for any domain
on-side.jp
Uptime & Server Information
Current Status
Observed Changes
| Date | Status | Server |
|---|---|---|
| 6/22/2026, 7:29:31 AM | Active | nginx |
| 11/10/2025, 7:14:01 PM | Active | nginx |
| 11/5/2025, 2:51:51 PM | Active | nginx |
| 10/28/2025, 10:32:02 AM | Active | nginx |
| 10/9/2025, 2:18:05 PM | Active | nginx |
| 10/6/2025, 1:28:06 AM | Active | nginx |
| 10/1/2025, 10:36:49 PM | Active | nginx |
| 9/27/2025, 3:52:16 PM | Active | nginx |
| 9/22/2025, 9:58:12 PM | Active | nginx |
| 9/18/2025, 8:38:37 PM | Active | nginx |
| 9/15/2025, 4:43:32 AM | Active | nginx |
| 9/10/2025, 5:11:40 PM | Active | nginx |
| 9/5/2025, 2:19:11 PM | Active | nginx |
| 9/1/2025, 10:06:00 PM | Active | nginx |
| 8/29/2025, 5:09:42 AM | Active | nginx |
| 8/23/2025, 2:44:39 PM | Active | nginx |
| 8/19/2025, 7:06:34 PM | Active | nginx |
| 8/17/2025, 4:08:46 AM | Active | nginx |
| 8/12/2025, 10:12:59 PM | Inactive | Unknown |
| 8/4/2025, 1:54:46 PM | Active | nginx |
| 6/5/2025, 11:11:29 PM | Active | nginx |
| 6/4/2025, 8:20:14 PM | Active | nginx |
| 4/22/2025, 1:40:46 PM | Active | nginx |
| 4/16/2025, 6:00:07 AM | 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, 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.