Website Uptime Monitor
Monitor website availability and server information for any domain
arc-lab.jp
Uptime & Server Information
Current Status
Historical Data
| Date | Status | Server |
|---|---|---|
| 7/29/2026, 5:16:24 AM | Active | Vercel |
| 3/27/2026, 12:49:01 AM | Active | Vercel |
| 11/8/2025, 3:47:03 AM | Active | nginx |
| 11/2/2025, 10:24:21 PM | Active | nginx |
| 10/30/2025, 6:20:54 AM | Active | nginx |
| 10/20/2025, 9:50:44 PM | Active | nginx |
| 10/16/2025, 7:55:14 PM | Active | nginx |
| 10/12/2025, 8:33:27 PM | Active | nginx |
| 10/8/2025, 2:52:45 PM | Active | nginx |
| 10/4/2025, 10:49:15 AM | Active | nginx |
| 9/29/2025, 8:23:01 PM | Active | nginx |
| 9/25/2025, 5:15:58 PM | Active | nginx |
| 9/21/2025, 5:32:48 PM | Active | nginx |
| 9/16/2025, 11:51:56 PM | Active | nginx |
| 9/12/2025, 4:42:32 PM | Active | nginx |
| 9/8/2025, 1:49:34 PM | Active | nginx |
| 9/4/2025, 6:49:29 PM | Active | nginx |
| 8/30/2025, 3:51:06 PM | Active | nginx |
| 8/26/2025, 12:19:44 PM | Active | nginx |
| 8/22/2025, 5:01:58 PM | Active | nginx |
| 8/21/2025, 11:04:07 AM | Active | nginx |
| 8/19/2025, 10:04:27 AM | Active | nginx |
| 8/16/2025, 6:59:17 AM | Active | nginx |
| 8/13/2025, 9:49:21 PM | Active | nginx |
| 8/9/2025, 6:35:06 PM | Active | nginx |
| 5/13/2025, 2:26:46 AM | Active | nginx |
| 5/8/2025, 3:35:41 PM | 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.
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.