Domain & DNS
Articles about domain & dns — tips, guides, and best practices.
What Is IP Geolocation and How Accurate Is It?
IP geolocation maps an IP address to a physical location. Learn how it works, what it can and cannot reveal, its uses, and its limitations.
March 5, 2026
What Are Nameservers and How Do They Work?
Nameservers are the backbone of the internet's addressing system. Learn what they do, how to find yours, when to change them, and common issues to watch for.
March 3, 2026
Subdomain Takeover: What It Is and How to Prevent It
Dangling DNS records can let attackers hijack your subdomains. Learn what subdomain takeover is, how it happens, and how to audit your DNS to stay safe.
February 28, 2026
A Record vs CNAME: When to Use Each DNS Record Type
Confused about A records and CNAMEs? Learn what each DNS record type does, when to use one over the other, and common mistakes to avoid.
February 24, 2026
DNS Propagation Explained: Why Your Domain Changes Take Time
After changing DNS records, updates don't happen instantly. Learn what DNS propagation is, why it takes time, how TTL affects it, and how to check progress.
February 20, 2026
Why Domain Age Matters When Deciding Whether to Trust a Website
New domains are disproportionately used for scams and phishing. Learn how to check domain age with WHOIS and what it reveals about a site's trustworthiness.
February 18, 2026
What Is SSL and Why It Matters for Your Security
Understand SSL/TLS certificates, how they protect your data, and why every website needs one. Learn to check any site's SSL status for free.
February 13, 2026
How to Read DNS Records: A Beginner's Guide
DNS records control how your domain works. Learn what A, AAAA, MX, CNAME, TXT, and NS records do, and how to look them up for free.
February 12, 2026
What Is WHOIS? A Guide to Domain Lookup
Learn what WHOIS data reveals about domain ownership, registration dates, and expiry. Find out how to look up any domain for free.
February 10, 2026
HTTP Security Headers Explained: What They Do and Why They Matter
Understand the most important HTTP security headers and how they protect websites. Learn what Content-Security-Policy, HSTS, and X-Frame-Options do.
February 8, 2026