RubanTools
Suggest a Tool

DNS Lookup

Query live DNS records for any domain - A, AAAA, MX, NS, TXT, CNAME, SOA, SRV and CAA record types supported.

DNS Record Lookup
DNS Record Types
TypePurpose
AMaps domain to IPv4 address
AAAAMaps domain to IPv6 address
MXMail exchange servers for email delivery
NSNameservers authoritative for the domain
TXTText records - SPF, DKIM, DMARC, site verification
CNAMEAlias pointing to another domain name
SOAStart of authority - zone metadata
SRVService discovery (VoIP, chat, etc.)
CAACertificate Authority Authorization

DNS Lookup - How Domain Name System Works

The Domain Name System (DNS) is the internet's distributed phone book, translating human-readable domain names (like rubansoftwares.com) into machine-readable IP addresses. Conceived by Paul Mockapetris in 1983 (RFC 882/883), DNS operates as a hierarchical global database with over 1,300 root servers managed by 12 independent organisations worldwide. Every time you type a URL into a browser, a DNS query is resolved - typically in under 50 milliseconds - before your connection reaches the target server.

Key DNS Record Types

Different DNS record types serve distinct functions. A records map a domain to an IPv4 address; AAAA records map to IPv6. MX records direct email to the correct mail server - critical for corporate email delivery and spam filtering. TXT records carry verification tokens used by Google Search Console, DKIM email authentication, and DMARC policies. NS records identify authoritative nameservers, while CNAME records create aliases from one domain to another. SOA (Start of Authority) records define the primary nameserver and zone parameters. India's top-level domain .in is managed by the National Internet Exchange of India (NIXI) and had over 3.5 million registered .in domains as of 2024.

Why Web Professionals Use DNS Lookup

Indian web developers, system administrators, and digital marketers use DNS lookup tools to debug propagation delays after domain transfers, verify SPF/DKIM records for email deliverability, confirm CDN CNAME configurations, and investigate whether a competitor's site uses cloud hosting (AWS Route 53, Cloudflare, Google Cloud DNS). DNS troubleshooting is a required skill for RHCSA, CompTIA Network+, and CCNA certifications increasingly pursued by Indian IT professionals.

DNS Records Questions

DNS (Domain Name System) records map human-readable domain names to the technical data needed to route internet traffic. You check DNS records to: troubleshoot email delivery failures (MX records); verify domain ownership for Google Search Console or Microsoft 365 (TXT records); confirm SSL certificate permissions (CAA records); check if DNS changes have propagated after migrating a website (A/CNAME records); or diagnose why a subdomain is not resolving. This tool queries live nameservers and returns current published values.

An A record maps a domain name to an IPv4 address (e.g. example.com → 93.184.216.34). An AAAA record maps a domain to an IPv6 address (e.g. 2606:2800:220:1:248:1893:25c8:1946). IPv4 uses 32-bit addresses (4 billion possible); IPv6 uses 128-bit addresses (340 undecillion possible). Most websites have both A and AAAA records for dual-stack connectivity. If only an A record exists, the site is IPv4-only. India's major ISPs (Jio, Airtel) support IPv6 on their networks.

An MX (Mail Exchanger) record tells other mail servers which server handles incoming email for your domain. Each MX record has a priority number - lower numbers are tried first. Multiple MX records provide redundancy: if the primary fails, email routes to the backup. Missing or misconfigured MX records are the most common cause of email delivery failures. Businesses in India using Google Workspace or Microsoft 365 must add MX records from those providers to their domain's DNS zone.

TXT records store text data in DNS and are used for: SPF (Sender Policy Framework - lists authorised email servers, preventing spoofing); DKIM (DomainKeys Identified Mail - public key for email signature verification); DMARC (policy for handling SPF/DKIM failures); domain ownership verification for Google Search Console, Microsoft 365, Zoho Mail; and BIMI (Brand Indicators for Message Identification). Most email deliverability issues in India stem from missing or incorrect SPF and DKIM TXT records.

DNS propagation time depends on the TTL (Time to Live) value of the record being changed. If the old record had a TTL of 3600 seconds (1 hour), DNS servers worldwide cache it for up to 1 hour before fetching the new value. Typical propagation: 1–4 hours for most changes; up to 48 hours in rare cases. To propagate faster, reduce TTL to 300 seconds (5 minutes) 24 hours before making the change. India's major ISP DNS resolvers (Jio, Airtel, BSNL) typically refresh within 2–4 hours.
Related Tools Browse all Text, Web & Dev Tools
QR Code Generator Word & Character Counter Case Converter Lorem Ipsum Generator JSON Formatter JSON Validator Base64 Encoder / Decoder URL Encoder / Decoder