Website Down Checker
See whether a site was up at our last check and when it last went down.
px4.io
Uptime & Server Information
Current Status
Observed Changes
| Date | Status | Server |
|---|---|---|
| 9/21/2026, 12:53:19 AM | Active | Flywheel/5.1.0 |
| 8/1/2026, 11:48:24 PM | Inactive | Unknown |
| 7/29/2026, 9:27:45 PM | Active | Flywheel/5.1.0 |
| 7/14/2026, 9:23:20 PM | Active | Flywheel/5.1.0 |
| 6/30/2026, 2:23:18 PM | Inactive | Unknown |
| 6/6/2026, 10:09:25 PM | Active | Flywheel/5.1.0 |
| 5/18/2026, 10:01:22 PM | Active | Flywheel/5.1.0 |
| 4/27/2026, 3:18:52 PM | Active | Flywheel/5.1.0 |
| 4/24/2026, 11:19:47 AM | Active | Flywheel/5.1.0 |
| 4/8/2026, 2:55:06 PM | Active | Flywheel/5.1.0 |
| 4/5/2026, 1:51:42 PM | Active | Flywheel/5.1.0 |
| 3/25/2026, 12:59:04 PM | Active | Flywheel/5.1.0 |
| 3/23/2026, 2:19:02 PM | Active | Flywheel/5.1.0 |
| 3/6/2026, 4:53:03 AM | Inactive | Unknown |
| 2/18/2026, 5:39:47 AM | Inactive | Unknown |
| 2/17/2026, 12:46:45 AM | Inactive | Unknown |
| 2/5/2026, 7:39:10 AM | Active | Flywheel/5.1.0 |
| 2/2/2026, 7:31:41 AM | Inactive | Unknown |
| 1/26/2026, 7:10:28 PM | Inactive | Unknown |
| 1/24/2026, 4:35:07 PM | Inactive | Unknown |
| 1/20/2026, 6:12:13 PM | Inactive | Unknown |
| 1/9/2026, 5:05:40 PM | Inactive | Unknown |
| 1/3/2026, 12:46:18 PM | Inactive | Unknown |
| 12/20/2025, 12:24:55 PM | Active | Flywheel/5.1.0 |
| 12/10/2025, 12:31:08 AM | Active | Flywheel/5.1.0 |
| 12/1/2025, 7:18:27 PM | Inactive | Unknown |
| 11/21/2025, 5:45:37 PM | Active | Flywheel/5.1.0 |
| 10/31/2025, 11:24:03 AM | Inactive | Unknown |
| 10/29/2025, 4:06:29 AM | Active | Flywheel/5.1.0 |
| 10/28/2025, 12:55:27 AM | Active | Flywheel/5.1.0 |
| 10/19/2025, 9:27:17 AM | Active | Flywheel/5.1.0 |
| 10/12/2025, 3:48:17 PM | Active | Flywheel/5.1.0 |
| 9/11/2025, 9:42:50 AM | Active | Flywheel/5.1.0 |
| 8/30/2025, 4:42:43 PM | Active | Flywheel/5.1.0 |
| 8/17/2025, 7:03:56 AM | Active | Flywheel/5.1.0 |
| 8/13/2025, 7:49:28 AM | Inactive | Unknown |
| 8/7/2025, 12:38:57 AM | Active | Flywheel/5.1.0 |
| 8/1/2025, 4:49:06 AM | Active | Flywheel/5.1.0 |
| 7/29/2025, 2:27:31 AM | Active | Flywheel/5.1.0 |
| 6/23/2025, 5:36:26 AM | Active | Flywheel/5.1.0 |
| 6/19/2025, 9:49:04 AM | Active | Flywheel/5.1.0 |
| 6/16/2025, 12:13:49 PM | Active | Flywheel/5.1.0 |
| 5/12/2025, 3:01:47 PM | Active | Flywheel/5.1.0 |
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, CNAME, TXT 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
This page shows whether we could reach a website the last time we checked it. We also keep a record of when it went down and came back, so you can see whether an outage is new or has happened before. For each site we show:
- Website availability and response status
- Server software and configuration
- Meta information including titles and descriptions
- Historical uptime patterns
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.