CNAME Studio
A DNS Studio tool
Resolver
Takeover
Full report
Guides
About
Studio tools
DNS
Check DNS records and propagation
DNSSEC
Check DNSSEC signing and validation
DKIM
Check email signing records
BIMI
Check brand logo records
TLS
Inspect TLS versions and chains
SSL
Check certificate status and expiry
Propagation
Check global DNS propagation
MTA-STS
Check inbound mail TLS policy
HSTS
Check HSTS and preload status
STARTTLS
Test SMTP STARTTLS encryption
CNAME
Follow CNAME chains and aliases
Redirects
Trace HTTP redirects and status
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CNAME Studio
Guides
Practical, plain-English explainers to go with the tool.
What is a CNAME record?
Aliases, chains, and the apex restriction.
Subdomain takeover
How a forgotten CNAME becomes an attacker foothold.
CNAME vs ALIAS vs ANAME
Apex aliasing, provider by provider.