Domain & DNS Record Diagnostics
Free DNS Lookup Tool — Check All Domain Records
Perform live DNS queries for any domain name worldwide. Inspect A (IPv4), AAAA (IPv6), MX (Mail Exchange), TXT (SPF/DKIM/DMARC), CNAME, NS (Nameservers), SOA, and CAA records with exact TTL and priority values. 100% free and client-side verified.
Quick Test:
Querying authoritative DNS servers over HTTPS…
Could not resolve DNS records. Please verify the domain name.
What is a DNS Lookup and How Does it Work?
The Domain Name System (DNS) is the internet’s decentralized phonebook. Whenever you type a domain like ucdreams.com into a browser, a DNS resolver queries authoritative nameservers to translate that human-readable domain into the numerical IP address (IPv4 or IPv6) hosting the web server. Our free online DNS Lookup tool queries authoritative DNS clusters via high-speed DNS over HTTPS (DoH) to reveal all public resource records configured for any domain worldwide.
Supported DNS Record Types & Definitions
Address Record
Maps a domain or subdomain directly to a 32-bit IPv4 address (e.g. 89.117.27.29).
IPv6 Address
Maps a domain directly to a 128-bit modern IPv6 address (e.g. 2606:4700::6810:85e5).
Mail Exchange
Specifies mail servers responsible for receiving email for the domain, along with priority preferences.
Text / Verification
Contains human/machine readable text. Used for email authentication (SPF, DKIM, DMARC) and site ownership tokens.
Canonical Name
Creates an alias from one domain name to another canonical domain (e.g. www pointing to root).
Nameserver
Delegates a DNS zone to use specific authoritative nameservers (e.g. Cloudflare, AWS Route 53).
Start of Authority
Stores core administrative metadata about the DNS zone, serial number, primary master server, and refresh intervals.
Certificate Authority
Restricts which Certificate Authorities (e.g., Let’s Encrypt, DigiCert) are authorized to issue SSL/TLS certificates.
Common Scenarios for Running a DNS Check
- Diagnosing DNS Propagation: After switching hosting providers or updating A records, verify if the new server IP has propagated globally.
- Fixing Email Delivery Issues: Ensure MX records point to the correct mail service (Google Workspace, Microsoft 365, Hostinger) and verify SPF/DKIM TXT records to prevent email from landing in spam folders.
- Troubleshooting Website Downtime: Quickly identify if a website outage is caused by misconfigured DNS records or expired nameserver delegations.
- Locating Server IPs: Discover which hosting infrastructure or CDN a website uses, and one-click trace the physical location with our companion IP Lookup tool.
Looking to Trace the Physical Location of this IP?
Use our free IP Lookup & Location Finder to inspect the city, country, ISP, and interactive OpenStreetMap pin for any IP address or domain host.
Frequently Asked Questions (FAQ)
What is a DNS lookup?
A DNS lookup is the query process that queries domain name servers to retrieve the specific records (IP addresses, mail servers, verification strings) associated with a given domain name.
How long does DNS propagation take?
DNS propagation typically takes anywhere from a few minutes up to 24–48 hours depending on the TTL (Time To Live) configured on the previous record and how frequently intermediate ISP resolvers refresh their cache.
What does TTL mean in DNS records?
TTL stands for Time To Live. It is a value in seconds that tells caching resolvers and browsers how long they may store and reuse the DNS answer before asking the authoritative nameserver again.
How do I check if my SPF or DKIM TXT record is working?
Select the TXT tab on our tool and enter your domain name. Look for records starting with v=spf1 for SPF or your selector subdomain (e.g., selector._domainkey.domain.com) for DKIM.
Is this DNS lookup tool free to use?
Yes, 100% free with unlimited queries. Queries are made in real time directly to high-availability DNS over HTTPS resolvers without tracking.