Website Down Checker

See whether a site was up at our last check and when it last went down.

Current Status

Status
Active
Server Type
nginx
Page Title
五车学府—视频教程|软件学习|知识分享
Meta Description
五车学府网是一家从事光学视频,光学设计,镜头设计,免费课程,光学工程师,光学自学,杂散光分析,光学理论,光学课程,光学教程,光学设计工程<br>师,光机一体化,光学解决方案,车灯设计,激光设计,光学仿真,光学模拟的视频教学平台
Meta Keywords
光学视频,光学设计,镜头设计,免费课程,光学工程师,光学自学,杂散光分析,光学理论,光学课程,光学教程,光学设计工程师,光机一体化,光学解决方案,车灯设计,激光设计,光学仿真,光学模拟
Last Checked
just now
Last Status Change
Came back up — 36 days ago (10/9/2026)
Last Downtime
First seen down 55 days ago (9/20/2026), back up 36 days ago

Observed Changes

DateStatusServer
10/9/2026, 4:27:37 AMActivenginx
9/20/2026, 5:53:22 PMInactiveUnknown
9/17/2026, 5:26:36 AMActivenginx

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 monitor with 7-day uptime percentage, failed checks, average latency by region, and daily outages

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.

Monitor uptime free

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.