Website Uptime Monitor

Monitor website availability and server information for any domain

Current Status

Status
Active
Server Type
nginx
Page Title
51 网 址 导 航 - 精 选 优 质 网 站 大 全 , 一 键 直 达 热 门 实 用 网 址 收 藏 与 分 类 导 航 平 台
Meta Description
51网址导航为您精心整理各类优质网站资源,涵盖新闻资讯、影视娱乐、购物生活、学习教育等热门分类网址大全。一站式网址收藏导航平台,帮助用户快速找到常用网站入口,上网更便捷更高效,是您日常浏览互联网的实用起点页。
Meta Keywords
网址导航,网站大全,网址大全,实用网站导航,热门网址收藏
Last Checked
just now
Last Status Change
Came back up — just now (9/25/2026)
Last Downtime
First seen down 5 months ago (4/2/2026), back up just now

Observed Changes

DateStatusServer
9/25/2026, 5:11:57 PMActivenginx
8/30/2026, 2:21:30 AMInactiveUnknown
4/2/2026, 4:31:42 PMInactiveUnknown
3/2/2026, 4:25:18 PMActiveMicrosoft-IIS/10.0
2/12/2026, 7:44:23 AMInactiveUnknown
2/8/2026, 2:01:54 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

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.

Monitor uptime free

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.