Website Uptime Monitor

Monitor website availability and server information for any domain

Current Status

Status
Active
Server Type
nginx
Page Title
ZhangJun Portfolio · UI / Product Designer
Meta Description
ZhangJun 的个人作品集。11 年 UI、交互与产品经验,专注 B 端 SaaS、数据可视化与 AI 应用。
Meta Keywords
Not available
Last Checked
just now
Last Status Change
Came back up31 hours ago (9/22/2026)
Last Downtime
First seen down 3 days ago (9/20/2026), back up 31 hours ago

Observed Changes

DateStatusServer
9/22/2026, 9:28:59 PMActivenginx
9/20/2026, 9:56:34 PMInactiveUnknown
8/2/2026, 8:28:06 AMActivenginx
7/31/2026, 5:14:20 AMActivenginx
7/28/2026, 6:57:34 PMInactiveUnknown
5/18/2026, 10:07:38 AMActivenginx
4/19/2026, 6:55:04 AMActivenginx
4/16/2026, 7:43:52 AMActivenginx
2/11/2026, 11:26:44 PMInactiveUnknown
1/11/2026, 12:22:08 AMInactiveUnknown
11/3/2025, 3:07:00 AMActivenginx
10/19/2025, 11:40:38 PMActivenginx
9/15/2025, 5:14:33 AMActivenginx
7/12/2025, 11:53:26 AMActivenginx
5/23/2025, 10:59:53 AMActiveBeaver
3/19/2025, 1:08:50 PMInactiveUnknown

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.