CNAME Lookup
Find canonical name aliases and subdomain configurations.
How to Use This Tool
- What to Enter
- Enter a domain or subdomain to check its CNAME (Canonical Name) record and follow the alias chain.
- What You Get
- Shows the CNAME target, TTL value, and traces the alias chain to the final resolved hostname and IP address.
How to Interpret Results
A CNAME record means this hostname is an alias for another domain. The chain should resolve to a final A/AAAA record. Long CNAME chains (3+ hops) add DNS latency. CNAME records at the zone apex (@ record) violate RFC 1034 and cause issues with MX and NS records.
Common Issues & Troubleshooting
CNAME at the zone apex conflicts with SOA and NS records — use ALIAS/ANAME records instead. CNAME loops (A → B → A) cause resolution failures. Pointing CNAME to a decommissioned service causes dangling DNS and potential subdomain takeover.