DNS Guides
Practical explainers for DNS operators and site owners.
DNS Record Types Explained: How to Read a Zone Without Guessing
A field guide to A, AAAA, CNAME, MX, TXT, NS, SOA, SRV, CAA and PTR records — what each one does and the mistakes that show up in real zones.
How to Flush DNS on Windows, macOS, Linux, and Browsers
The local DNS cache commands that actually help after a change on Windows, macOS, Linux and browsers, and what no website can flush for you.
TTL Explained: How to Change DNS Without Taking the Site Down
TTL decides how long a mistake lives in other people’s caches. Here is how to plan a DNS change so the cutover is boring.
DNS Propagation: Why Changes Take Time (and How to Verify)
Learn what DNS propagation really means, how TTL drives resolver caches, and how to verify a change across public resolvers without the myths.
A DNS Migration Checklist That Survives Contact With Reality
Moving zones between providers is easy the day you do it and painful the week after. A staged checklist that catches the records everyone forgets.
Nameservers vs Hosting: Stop Mixing the Two
Why changing your web host is not the same as changing your DNS host, and a safe order for migrating records without losing mail.
DNS Explained: How the Internet Finds Your Website
A clear walkthrough of recursive resolvers, authoritative nameservers, the record types that matter, and how TTL decides when changes take effect.
DNSSEC Basics: Chains of Trust Without the Panic
DS records, DNSKEY material and validating resolvers explained for operators rolling out signed zones, including rollovers that cause outages.