Blog
Practical guides and data reports on DNS, domains, hosting, SSL, website technology and email security.
How to Generate a DMARC Policy Record
Learn how to generate a DMARC policy record to protect your domain from email spoofing and phishing. Follow our clear, step-by-step guide today.
How to Check If a Website Is Down for Everyone or Just You
Learn how to troubleshoot website outages, fix local network issues, and determine if a site is down globally using a reliable website down checker.
How to Trace Redirect Chains and Fix Redirect Loops
Learn how to trace harmful redirect chains and fix endless redirect loops using expert troubleshooting steps, exact configurations, and server tips.
How to Check HTTP Response Headers for Security and SEO
Learn how to use an HTTP headers checker to audit security policies, fix SEO issues, and protect your website visitors from web threats today.
How to Find Website Technologies Used by Any Site
Learn how to find website technologies, CMS, analytics, and frameworks used by any site with practical steps, tools, and exact commands.
What Is a CNAME Record and When Should You Use It?
Learn what a CNAME record is, how it works in DNS, and when to use it. Run a cname lookup to debug records instantly.
How to Perform a Reverse DNS Lookup on an IP Address
Learn how to perform a reverse DNS lookup to find domain names linked to IP addresses. Step-by-step guide for network engineers and admins.
How to Fix 'ERR_NAME_NOT_RESOLVED' DNS Error
Learn how to troubleshoot and fix the ERR_NAME_NOT_RESOLVED error with practical step-by-step DNS troubleshooting guides and terminal commands.
What Is My Public IP Address and Location?
Discover what is my IP, how public and private IP addresses work, and how to find your network location and ISP details instantly in plain English.
How to Check Domain Age to Determine SEO Value
Find out how old any domain is in seconds. Check the exact registration date and domain age for free using WHOIS, RDAP or our instant checker.
What Is a DMARC Record and How to Set It Up
Learn what a DMARC record is, why it protects your domain from spoofing, and follow a step-by-step guide to set it up and test it correctly.
How to Verify SSL Certificate Expiration and Errors
Learn how to verify SSL certificate expiration, chain issues, and configuration errors using manual commands and online diagnostic tools.