Resources

Guides, tutorials, and tips for domain expiry monitoring.

How to Check DNS Propagation After Making Changes

Learn how to check DNS propagation status after making changes. Understand TTL, use global propagation checkers, and avoid common mistakes.

How to Check and Verify MX Records

Learn how to check and verify MX records for any domain. Covers dig, nslookup, web tools, priority values, and common email provider configurations.

How to Check TXT Records: SPF, DKIM, and DMARC

Learn how to check TXT records including SPF, DKIM, and DMARC. Covers lookup methods, validation techniques, and common misconfigurations to avoid.

Common DNS Errors and What They Mean

A complete reference guide for DNS error codes and common problems including NXDOMAIN, SERVFAIL, REFUSED, and browser-level DNS errors with causes and fixes.

DNS Caching and TTL: What They Mean for Your Site

Understand how DNS caching works at every level, what TTL values mean, how to choose the right TTL, and best practices for faster propagation.

DNS Change Management: A Strategy for Zero-Downtime Updates

A strategic framework for managing DNS changes with zero downtime. Covers pre-change checklists, TTL management, staged rollouts, and rollback plans.

DNS Hijacking: How It Works and How to Detect It

Learn how DNS hijacking works, the different types of DNS attacks, real-world examples, and how to detect and prevent DNS spoofing and poisoning.

DNS Monitoring Explained: Why Uptime Checks Aren't Enough

Learn what DNS monitoring is, how it differs from uptime monitoring, what it watches, who needs it, and why uptime checks alone miss critical issues.

DNS Monitoring Glossary: Terms You Should Know

A comprehensive A-Z glossary of DNS and monitoring terminology. Over 50 essential terms defined with clear, concise explanations for IT professionals.

DNS Propagation: What It Is and Why It Takes Time

Learn what DNS propagation really is, why it takes time, and how TTL affects how quickly DNS changes appear worldwide. Debunk the 48-hour myth.

How to Audit DNS Records Across Your Domain Portfolio

Learn how to audit DNS records across your domain portfolio. Covers audit checklists, identifying stale records, security gaps, and automating ongoing audits.

DNS Record Types Explained: A, AAAA, CNAME, MX, TXT, NS, SOA

A complete guide to DNS record types including A, AAAA, CNAME, MX, TXT, NS, and SOA records. Learn when to use each type with real-world examples.

DNS Record Types: Complete Reference Guide

A complete reference guide covering all DNS record types including A, AAAA, CNAME, MX, TXT, NS, SOA, SRV, PTR, CAA, and NAPTR with syntax, usage, and examples.

How DNS Resolution Works (Step by Step)

A step-by-step guide to how DNS resolution works, from browser cache to authoritative nameserver. Understand recursive and iterative queries.

DNS Security Best Practices for Your Domain

A comprehensive DNS security checklist covering DNSSEC, registrar locks, CAA records, email authentication, monitoring, and more to protect your domain.

DNS Troubleshooting: How to Fix Common DNS Problems

Systematic guide to troubleshooting DNS problems. Covers site not loading, email failures, propagation delays, NXDOMAIN, SERVFAIL, and wrong IP resolution.

How to Flush DNS Cache on Every Platform

Step-by-step instructions to flush DNS cache on Windows, macOS, Linux, Chrome, Firefox, Safari, and routers. Learn when and why to clear your DNS cache.

How to Change Nameservers Without Breaking Your Site

Step-by-step guide to safely changing nameservers. Covers pre-migration checklist, TTL management, record verification, monitoring, and rollback strategy.

How to Check DNS Records for Any Domain

Learn how to check DNS records using command-line tools, web-based lookups, and monitoring platforms. Covers dig, nslookup, and online DNS checkers.

How to Monitor DNS Records for Unexpected Changes

Learn how to monitor DNS records for unauthorized or unexpected changes. Covers manual approaches, automated monitoring, alerting, and incident response.

Why You Should Use Multiple DNS Providers

Learn why DNS redundancy matters and how to implement a multi-provider DNS strategy with primary/secondary or active/active configurations for maximum uptime.

Public DNS Providers Compared: Google, Cloudflare, Quad9, and More

Compare the best public DNS providers including Google, Cloudflare, Quad9, OpenDNS, and NextDNS. Covers speed, privacy, security features, and IP addresses.

How to Perform a Reverse DNS Lookup

Learn how to perform reverse DNS lookups to find the domain associated with an IP address. Covers PTR records, dig -x, nslookup, and email deliverability.

What Happens When DNS Records Change Unexpectedly

Understand the impact of unexpected DNS record changes, how unauthorized modifications happen, and how to detect and respond to DNS incidents.

Why DNS Records Matter More Than You Think

DNS records are the invisible routing layer behind every website, email, and online service. Learn why getting them right is critical for uptime and security.