Website Uptime Monitor

Monitor website availability and server information for any domain

modbuspoll.com

Uptime & Server Information

WhoisRDAPDNS RecordsCertificateUptimeDiagnosticsHistoryHide Contact Info

Current Status

Status
Active
Server Type
cloudflare
Page Title
Modbus Poll — Modbus RTU & TCP/IP Monitor for macOS, Windows, Linux & Android
Meta Description
Modbus Poll is a lightweight desktop & mobile app for macOS, Windows, Linux, Android, and iOS to monitor and write Modbus RTU & TCP/IP registers. Publish live data to MQTT, log to CSV, and view 28 register display formats. Includes a built-in TCP Server Simulator with random data generator. Supports FC01–FC16 and auto-polling. Free for Windows, Linux & Android, $4.99 on Mac App Store, $1.99 on iOS App Store.
Meta Keywords
modbus poll, modbus monitor, modbus master, modbus slave, modbus simulator, modbus scanner, modbus reader, modbus tester, modbus debugger, modbus client, modbus server, modbus rtu, modbus tcp, modbus tcp/ip, modbus ascii, rs485, rs-485, rs232, usb to rs485, serial modbus, serial communication software, modbus macos, modbus windows, modbus linux, modbus android, modbus ios, modbus mobile app, modbus poll android, modbus poll for android, modbus android app, modbus google play, android modbus client, android modbus scanner, android modbus master, mobile modbus tool, modbus iphone, modbus ipad, mac modbus software, windows modbus software, linux modbus software, modbus app, modbus software, modbus desktop app, modbus desktop software, modbus tool, free modbus software, free modbus tool, modbus poll free, free modbus simulator, free rs485 software, modbus free download, plc communication software, plc testing tool, hmi testing tool, industrial automation software, scada tool, iot gateway software, mac app store modbus, modbus apple silicon, modbus windows 10, modbus windows 11, modbus ubuntu, modbus debian, modbus fedora, modbus deb installer, modbus appimage, modbus rpm, modbus zip installer, modbus msi installer, modbus mqtt, modbus mqtt bridge, modbus to mqtt, mqtt publish, mqtt gateway, modbus csv export, modbus csv logger, modbus data logger
Last Checked
just now
Last Status Change
Came back up — 23 days ago (9/23/2026)
Last Downtime
First seen down 33 days ago (9/14/2026), back up 23 days ago

Observed Changes

DateStatusServer
9/23/2026, 8:56:31 AMActivecloudflare
9/14/2026, 2:26:38 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.