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
Unknown
Page Title
2026执业药师_2026护士资格_2026消防工程师_雪狐狸_鸭题库
Meta Description
广州市优学电子科技有限公司是国内领先的在线职业教育机构,旗下拥有鸭题库、雪狐狸等众多品牌,培训范围涵盖执业药师、护士资格、药师职称、消防工程师、经济师、执业医师、会计职称、教师职称、建造师、健康管理师、python编程、经济师等多个门类。公司助力百万学子职业发展,重新定义职业教育标准,给您极致的课程与服务。
Meta Keywords
鸭题库,雪狐狸,执业药师,护士资格,药师职称,消防工程师,派森编程,初级会计职称,中级会计职称,健康管理师
Last Checked
just now
Last Status Change
Came back up — 6 months ago (4/24/2026)
Last Downtime
First seen down 9 months ago (2/1/2026), back up 6 months ago

Observed Changes

DateStatusServer
9/7/2026, 4:31:05 PMActiveUnknown
5/18/2026, 8:10:15 PMActiveUnknown
4/24/2026, 12:14:00 PMActiveUnknown
2/1/2026, 4:59:50 AMInactiveUnknown
1/18/2026, 9:01:20 PMActiveUnknown
1/15/2026, 11:22:44 AMInactiveUnknown

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.