plcprogrammingblog.com

Get an email when its DNS, website or certificate changes.

plcprogrammingblog.com serves a website of its own over HTTPS and under www. It answers on IPv4 only, with a valid TLS certificate and MX records for mail.

1,106,557 other domains share an IP address with it.

The most recent crawl returned the page title “PLCDocs: PLC Programming and Ladder Logic Tools” and 60,763 bytes of HTML.

Domain properties

Property	Value	Explanation
Top-level domain	.com	Statistics for all domains we know under this TLD.
Has website	yes	A website is hosted under the domain, which does not redirect to an external domain.
Has MX-record	yes	The domain has an MX record.
External redirect	no	The domain redirects to another domain.
Redirect to https	yes	The domain redirects to https.
Redirect to www.	yes	The domain redirects to www.domain.
Only with www.	no	The domain can only be reached with the subdomain "www".
Only DNS, no website	no	There are no A or AAAA records in DNS.
IP-Address	only IPv4	Shows whether the domain only has IPv4 or IPv6 or both.
SSL-Certificate	valid	Shows whether the domain has a valid SSL certificate.
Redirects	0	Number of domains that redirect to this domain.
Reverse IP	1,106,557	Number of domains with the same IP(s).

This data through the API

The data on this page is also available as JSON: /lookup for the key facts, /reverseip, /redirect and /similar for the lists, and /dnshistory with Basic and Premium. A free account comes with an API key and 100 calls a day.

curl -X POST https://api.webxtrend.com/v1.0/lookup \
  -H 'Content-Type: application/json' \
  -d '{"token": "YOUR_TOKEN", "query": "plcprogrammingblog.com"}'

Create a free account Read the API docs

Similar websites

Website	Similarity
controlsystemguide.com Free PLC Programming Tutorials & Industrial Automation Guides \| Control System Guide Free Industrial Automation Tutorials — Updated 2026	88 %
plcai.app PLC AI: Ladder Logic Simulator & Automation Training App - PLC Ladder Logic Simulator, PLC Simulator, PLC Training PLC ladder logic simulator, train in automation, and troubleshoot HMIs & VFDs with AI. Siemens TIA Portal & Rockwell RSLogix. Download free on iOS & Android.	86 %
bobteachestech.com Home-Bob Teaches Tech - Bob Teaches Tech Learn practical tutorials in PLC programming, industrial automation, mechatronics, and embedded systems — written by an engineer who builds the systems befor...	85 %
solisplc.com SolisPLC \| Online PLC & Automation Training SolisPLC helps organizations, teams, and individuals build PLC programming and automation skills with expert-led online courses.	84 %
learningautomation.co.uk Home - Learning Automation Fundamental Learning For Industrial Automation, PLC's and Robotics Learn more about industrial robotics, PLC programming, HMI design and controls engineering...	84 %
mnautomationacademy.com MN Automate \| Industrial Automation Education, Resources & Software Practical PLC and industrial automation courses, engineering resources and software for automation engineers.	84 %
mrplcprogrammer.com Mr PLC Programmer \| PLC Tools & Automation Community Practical PLC calculators, Mitsubishi programming tools, automation tutorials and community answers.	84 %
garyandersonbooks.com PLC and Automation Training Resources \| Gary Anderson Build practical skills in PLC programming, Studio 5000, industrial automation and troubleshooting with step-by-step books and downloadable training resources.	82 %
unifcad.com UnifCAD \| Modern Electrical & PLC Simulator The most advanced browser-based simulator for electrical schematics and PLC ladder logic. Design, simulate, and learn with professional-grade tools.	82 %
plcpro.com PLC Programming Methods for Sequencing Machines \| PLCPro Field-proven PLC programming methods for industrial automation, built around sequence-based machine control, resilient operation, and maintainability.	81 %
mechatronicslab.net Electrical, Electronics & PLC Training Learn electrical engineering, electronics, PLC programming, industrial automation, and practical circuit skills through interactive lessons and simulations.	81 %
plcsimulator.online PLC Simulator Online & Ladder Diagram Documentation Explore our comprehensive PLC Simulator Online Documentation for insightful guides on ladder logic creation, simulation, and sharing. Perfect your PLC progra...	81 %
understandautomation.com Understand Automation \| Industrial Automation Explained Simply Step-by-step guides on PLCs, VFDs, sensors, and industrial networks—clear, practical, and ready to use at work.	81 %
plcsmarttech.com PLC Smart Tech \| Industrial Automation Technical Reference Independent technical guides on PLC troubleshooting, program documentation, enclosure ratings, and VFD speed control. Verify standards with primary sources	81 %
controlsengineeringacademy.com Controls Engineering Academy Learn PLC programming by building projects in your browser.	81 %
openlogic-automation.com AnyPLC \| Hardware-Independent Virtual PLC AnyPLC combines a Virtual PLC runtime that supports multiple vPLC instances with multi-device engineering, FBD, Modbus, OPC UA, EtherCAT, scripting, and AI a...	81 %
automateitsimpl.com Home \| Automate it simple Discover the best courses to enhance your skills.	81 %
plc4me.fit PLC4me – Automation Engineering Resources and PLC Utilities PLC4me provides free PLC programming tools, automation software, engineering guides, and technical resources for students, technicians, and engineers.	81 %
ab-copilot.com AB Copilot - AI Assistant for Studio 5000, RSLogix 500 & Micro800 Logic Open an L5X, SLC or CCW export and ask about it in plain English. AB Copilot draws the ladder, traces every tag and explains undocumented logic — all on your...	81 %
controlstrainer.com ControlsTrainer \| Interactive PLC & Industrial Controls Training Interactive industrial controls training in your browser. Wire a control panel, program the PLC and lock out the machine. Levels 1–2 are free.	81 %

Websites whose start page offers something similar, found by comparing the text of their start pages, across languages. Near-identical copies, parking pages and error pages are left out. The full list of up to 100 comes through the API: similar websites.

Last SSL certificate

Issuer	Let's Encrypt
Valid from	8/19/2026
Valid to	11/17/2026
Time until expiry	28 days

Last successful crawl

Title	PLCDocs: PLC Programming and Ladder Logic Tools
Description	Free tools and in-depth guides for controls engineers: PLC programming, ladder logic, structured text, SCADA, HMI, Modbus, and analog scaling, built by automation engineers for the field.
Content-Length	60,763 bytes

Title and description as published by the page itself in its own <title> and <meta name="description"> tags.

DNS history

IPv4 address	Last updated
76.76.21.21	6/23/2026

Mail server	Priority	Last updated
eforward1.registrar-servers.com	10	6/23/2026
eforward2.registrar-servers.com	10	6/23/2026
eforward3.registrar-servers.com	10	6/23/2026
eforward4.registrar-servers.com	15	6/23/2026
eforward5.registrar-servers.com	20	6/23/2026

Name server	Last updated
dns1.registrar-servers.com	6/23/2026
dns2.registrar-servers.com	6/23/2026

The five most recent states of each record type. The full history comes through the API: DNS history.

Most recent redirect domains

No domains found.

Reverse IP neighbours

76.76.21.21 1,106,557 domains · here since 9/17/2026

Domain	On this IP since
zzzzzem.tech	9/17/2026
zzzzzebra.com	9/13/2026
zzzzhi.com	9/17/2026
zzzyyp.cn	9/23/2026
zzzygh.cn	9/19/2026
zzzybzsb.com	9/15/2026
zzzy1688.com	9/18/2026
zzzwd.com	9/19/2026
zzzventurescapital.com	9/19/2026
zzztimer.com	9/13/2026
zzztgjg.cn	9/14/2026
zzzsyl.com	9/23/2026
and 1,106,544 more

Sharing an address does not always mean sharing a server: on a CDN or a large hosting platform, millions of unrelated domains answer on the same few addresses. We measured how far that goes in Half the web sits on 276 IP addresses. The complete list of neighbours, also for an IP address, comes through the API: reverse IP lookup.

Dive into our data, search now!