CNAME Record Lookup
Look up CNAME (Canonical Name) records for a domain. Verify alias redirections and their target addresses.
What is a CNAME (Canonical Name) record?
A CNAME record maps one domain name to another — it acts as an alias. For example, www.example.com → example.com is a typical CNAME redirect.
A domain with a CNAME record cannot coexist with A, AAAA, or MX records. During DNS resolution, the chain is followed until an A record is reached.
Understanding CNAME record results
Record found
The domain is aliased to the shown target. The actual IP address comes from the A record of the target domain.
No record found
The domain resolves directly via A/AAAA records, or no CNAME was ever added. Using CNAME on an apex (root) domain is against RFC.
CNAME chaining
A CNAME can point to another CNAME, but long chains increase DNS resolution time and some providers enforce limits.
Frequently asked questions
No, per RFC 1034. CNAME on example.com (apex) is invalid. Some DNS providers offer CNAME Flattening or ALIAS/ANAME records as a workaround.
No. RFC 2181 forbids other record types alongside a CNAME for the same name. Use an A record instead if you also need MX.
Depending on the TTL, anywhere from a few minutes to 48 hours. Lowering TTL to 300 before a change speeds up propagation.
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