Note: You can enter a domain name, an IPv4 address, or both. For a domain name, all available records of these 8 DNS types will be fetched: A, AAAA, MX, NS, SPF, SOA, TXT, and CNAME. For an IP address, only the PTR record will be fetched.
A DNS lookup queries the Domain Name System to retrieve resource records associated with a domain name or IP address. These records control how internet traffic is routed by mapping domains to IPv4 and IPv6 addresses, specifying mail servers, defining sender authentication policies, and aliasing one hostname to another.
WhoisFreaks queries authoritative nameservers directly, not a single resolver, and returns all 8 major record types in a single call.
Feature: Live queries against authoritative nameservers, not a single resolver, for current, propagation-accurate data
Feature: All 8 DNS record types fetched in one call: A, AAAA, MX, NS, SPF, SOA, TXT, CNAME, with PTR for IP inputs
Feature: Accepts both domain names and IPv4 addresses
Feature: Domain lookups return 8 record types
Feature: IPv4 lookups return PTR / reverse DNS records
Feature: Free tool covers individual lookups
Feature: Bulk processing is available through the API
For monitoring DNS changes across hundreds or thousands of domains, integrating live DNS data into uptime checks, or feeding CI/CD deployment validation, the DNS Checker API returns parsed JSON for all record types at scale with rate-limit controls and parallel-domain processing.
DNS Lookup is the starting point for nearly any DNS-related task: troubleshooting email delivery, verifying a website migration after a hosting change, mapping threat infrastructure, or debugging a CDN configuration. Each of the four use cases below has a different DNS record at its centre.
After changing hosting providers or DNS configurations, DNS Lookup verifies the changes have propagated correctly - confirming A records point to the right IP, CNAME aliases resolve as expected, and nameservers have been updated. For nameserver-specific queries, use the NS Lookup tool.
Email deliverability problems almost always trace back to DNS. DNS Lookup retrieves MX records (mail routing), SPF records (sender authorization), and TXT records (DKIM, DMARC) simultaneously - giving a complete email authentication picture in one query. Use the dedicated MX Lookup tool for deeper mail server analysis.
DNS records are foundational intelligence in threat investigations. Checking A records reveals the IP hosting a suspicious domain; NS records show who controls DNS; TXT records can expose misconfigured services or attacker-planted data. For historical DNS - seeing how records looked during a past attack - use the Historical DNS Lookup.
Developers use DNS Lookup to verify zone configurations, debug CNAME chains, and confirm CDN or load balancer setups. The structured JSON output via the DNS API integrates directly into monitoring scripts, CI/CD pipelines, and uptime alerting systems.
WhoisFreaks queries authoritative nameservers directly rather than relying on a single recursive resolver, so results reflect the current zone state instead of cached or geo-localized values. All 8 major DNS record types - A, AAAA, MX, NS, SPF, SOA, TXT, CNAME - return in one call, and IP inputs return the PTR record.
Key features:
Use the DNS lookup API to retrieve domains’ CNAME records with recursive depth up to 5 levels, supporting both bulk and live queries.
