DNS Lookup vs DNS Propagation Checker (When to Use Each)
Quick Answer: Use a DNS Lookup tool to view the current authoritative records for a domain and debug configuration errors. Use a DNS Propagation Checker when you have made a change (such as updating an IP address) and need to verify whether that change has reached recursive resolvers across the globe. Why DNS Lookup and […]
How to Audit DNS Records Before Website Migration
Quick Answer: Before migrating a website, perform a full DNS Records audit by mapping all active records, reducing your TTL (Time-to-Live) to 300 seconds, and documenting TXT records for email. Verify these records against your authoritative nameserver, not just a recursive cache, to ensure the new server will handle all traffic, subdomains, and mail services […]
What Makes a DNS Checker Accurate? (Behind the Tool)
Quick Answer: An accurate DNS checker must distinguish between authoritative lookups and recursive lookups. It should query the domain’s primary nameserver directly to reveal the true state of your zone file, while simultaneously checking multiple global recursive resolvers to report propagation status. If a tool doesn’t clarify which query type it is performing, it is […]
How to Verify DNS Changes Before Going Live
Quick Answer: To verify DNS changes before go-live, query your authoritative nameserver directly using dig or a dedicated verification tool. Bypass global recursive caches by targeting the specific nameserver hosting your records. If the record returns the expected value there, your change is correctly staged. Only after this verification should you consider propagation to the […]
DNS Health Check: What to Analyze in Your Domain
Quick Answer: A DNS health check is the systematic audit of your domain’s zone records, nameserver responses, and propagation status. It confirms that your A, MX, TXT, and CNAME records are valid, that your TTL settings allow for agility, and that your security protocols, such as SPF, DKIM, and DNSSEC, are correctly configured to prevent […]
How to Monitor DNS Changes Automatically
Quick Answer: Automatic Monitor DNS detects unauthorized or accidental changes to your domain records by polling your authoritative nameservers for updates to your SOA (Start of Authority) serial number and record values. By receiving instant alerts when a record changes or fails to resolve, you can prevent downtime, subdomain takeovers, and email delivery failures before […]
DNS Audit Checklist for Businesses
Quick Answer: A DNS audit checklist for businesses covers the validation of critical record types (A, MX, TXT, CNAME), TTL configuration, and security settings. By systematically reviewing your zone files, you verify email deliverability, prevent site outages caused by record drift, and protect your domain against unauthorized subdomain takeovers. Why Every Business Needs a DNS […]
A Record vs CNAME: Real Use Cases Explained
Quick Answer: An A Record connects a domain name straight to a fixed IP address. A CNAME, on the other hand, links an alias to another domain name. Use A records for your main domain to point to a specific server. For subdomains like www or blog, use CNAME records to make updates easier if […]
SPF vs DKIM vs DMARC: What Each Actually Does
Quick Answer: SPF lists the IP addresses allowed to send email for your domain. DKIM attaches a digital signature to verify that the message wasn’t altered in transit. DMARC tells the receiving server what to do if SPF or DKIM checks fail (e.g., reject the email or send it to the spam folder). Why Email […]
Authoritative DNS vs Recursive DNS (Full Breakdown)
Quick Answer: Recursive DNS acts as the “librarian,” searching the Internet to find the IP address for a requested domain. Authoritative DNS acts as the “source of truth,” storing the official records for that specific domain. When you type a URL, your browser asks the recursive resolver to fetch the answer from the authoritative server. […]