DNS Lookup Tool
Look up A, AAAA, MX, TXT, NS, and CNAME DNS records via Google DNS (8.8.8.8). Diagnose domain setup issues and mail delivery errors instantly.
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- λλ©μΈ μ λ ₯ ν μ‘°ν λ²νΌ ν΄λ¦ (μ: google.com)
- A/AAAA/MX/TXT/NS/CNAME/SOA 7κ°μ§ λ μ½λ νμ μ§μ
- Google (8.8.8.8) + Cloudflare (1.1.1.1) λμ μ‘°ν Β· μλ΅ μλ λΉκ΅
- λΉκ΅ λͺ¨λ: λ DNS μλ² κ²°κ³Όλ₯Ό λλν λΉκ΅
- MX λ μ½λ: Gmail, Outlook λ± λ©μΌ μλΉμ€ μλ κ°μ§
- TTL μκ°ν λ° + λ μ½λ λ³΅μ¬ λ²νΌ μ 곡
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Frequently Asked Questions
Q. What is DNS and why does it matter?
DNS (Domain Name System) is the internet's address book β it translates domain names like "millionscode.com" into IP addresses computers can connect to. DNS issues can cause websites to load slowly or not at all.
Q. What DNS record types does this tool check?
This tool queries A, AAAA, CNAME, MX, TXT, NS, and SOA records. Each serves a different purpose: A records map to IPv4 addresses, MX records handle email routing, TXT records verify domain ownership.
Q. How long does DNS propagation take?
DNS propagation typically takes 24β48 hours globally. During propagation, different users may see old or new DNS records depending on their ISP's cache. TTL (Time to Live) values control how long records are cached.
Q. What is a low TTL and why would I set it?
TTL (Time to Live) tells DNS resolvers how long to cache your record. Before making DNS changes (e.g., migrating hosting), lowering TTL to 300 seconds (5 minutes) allows faster global propagation of the change.
Q. How do I check if my SSL certificate is properly configured?
Check that your A record points to the correct server IP. Then verify the TXT record for CAA (Certification Authority Authorization). Most SSL issues stem from misconfigured A/CNAME records or expired certificates.
Q. Can I use this tool to verify email setup (MX records)?
Yes. Look up MX records for your domain to confirm email routing configuration. Google Workspace users should see Google's MX records; Microsoft 365 users should see Outlook MX records.
How to Use
Type the domain name you want to query (e.g., millionscode.com).
Choose the DNS record type (A, CNAME, MX, TXT, NS, etc.) or select "All" to view all records.
See the current DNS records returned by public DNS resolvers (Google 8.8.8.8, Cloudflare 1.1.1.1).
Compare results with your registrar's settings to identify misconfigured or missing records.
Expert Knowledge: DNS Lookup Tool
DNS (Domain Name System) is the foundational infrastructure layer of the internet. Every web request begins with a DNS lookup β resolving the human-readable domain to an IP address. The global DNS system processes over 4.2 trillion queries per day across a distributed network of root servers, TLD (Top-Level Domain) servers, and authoritative nameservers.
For website performance, DNS resolution time is a critical pre-connection latency factor. Chrome's Resource Timing API reports DNS lookup time as a separate metric. CDN providers like Cloudflare use anycast routing to route DNS queries to the geographically nearest resolver, reducing lookup latency from 50β100ms (traditional DNS) to 5β10ms. This is why migrating to Cloudflare DNS can measurably improve global page load speeds.
DNS security is an increasingly important concern. DNS hijacking (redirecting domains to malicious servers), DNS amplification attacks (using open resolvers for DDoS), and DNS cache poisoning are real-world threats. DNSSEC (DNS Security Extensions) provides cryptographic authentication of DNS responses. Modern websites should also implement DMARC, DKIM, and SPF TXT records to prevent email spoofing β all verifiable through DNS lookup tools.
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