Website Uptime Monitor

Monitor website availability and server information for any domain

Current Status

Status
Active
Server Type
正統心算
Page Title
Welcome to CMA Mental Arithmetic
Meta Description
珠算-Abacus Mental Arithmetic,心算-Mental Arithmetic,Aural Mental Arithmetic-唸心算.正統心算-CMA,專業心算機構 採用雙手撥珠 獨特教學 效果最好 左右腦同時開發 造就全人的教育 招生:幼兒班 兒童班 成人班 師資班
Meta Keywords
正統心算-CMA,開發腦力,教育機構,專業心算機構,雙手撥珠,左右腦同時開發,幼兒班,兒童班,成人班,師資班
Last Checked
just now
Last Status Change
Came back up — 8 days ago (10/9/2026)
Last Downtime
First seen down 35 days ago (9/12/2026), back up 8 days ago

Observed Changes

DateStatusServer
10/9/2026, 9:45:54 PMActive正統心算
9/12/2026, 1:26:59 PMInactiveUnknown
8/31/2026, 3:56:58 PMActive正統心算
7/16/2026, 2:21:22 AMActive正統心算
3/6/2026, 6:17:00 AMActive正統心算
8/19/2025, 4:11:48 PMActive正統心算

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

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.