CNAME 検索
サブドメインの CNAME がどこを指しているかを確認し、CDN・SaaS・Vercel / Netlify のカスタムドメイン設定を検証します。
AK
appkiro.comResolve CNAME aliases for subdomains used by CDNs, SaaS platforms, and hosted services.
CNAME Lookup helps you confirm where a subdomain really points. It is especially handy for www records, CDN setup, custom domains in SaaS apps, and hosted storefronts where the provider gives you a target hostname to use.
Enter a full subdomain such as www.example.com, app.example.com, or shop.example.com. If the hostname has a CNAME, the result shows the canonical target it follows.
That does not always mean something is broken. The hostname might use A or AAAA records instead, or the root domain may be using an ALIAS or ANAME feature from the DNS provider.
When a CDN or SaaS platform says a custom domain is not connected, compare the returned CNAME target with the exact hostname they asked you to set. Small differences, extra dots, and old targets are easy to miss in a DNS dashboard.
CLI equivalent
dig www.example.com CNAMENetwork checks run from the app server, so results reflect what is reachable from that public environment. Localhost, private IPs, and internal-only targets are blocked.
A CNAME makes one hostname an alias of another hostname. DNS then follows the target to find the final records.
Standard DNS does not allow a normal CNAME at the zone apex when other records exist. Many providers offer ALIAS or ANAME as a workaround.
It lets them move infrastructure behind the target hostname without asking you to update IP addresses manually.
No. CNAME is a DNS alias. It does not redirect browsers or change URLs by itself.