What does a security header checker do?

A security header checker reviews HTTP response headers that help protect a website, including HSTS, Content Security Policy, Reverse DNS, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy.

Are security headers important?

Yes. Security headers can help reduce risks related to clickjacking, MIME sniffing, insecure HTTP access, referrer leakage, and unsafe browser behavior.

Does a security header checker replace a full security audit?

No. A security header checker is useful for spotting missing browser security headers, but it does not replace a full website security audit.

Free Domain IP & DNS Lookup Tool

Free domain IP lookup for finding website IP addresses.

Find the IPv4 and IPv6 addresses connected to a domain, review CNAME records, nameservers, reverse DNS results, and basic DNS response details.

✓ No signup required ✓ Security header report ✓ Built-in abuse protection

How the domain IP lookup tool works.

This tool queries public DNS records and returns the domain's IPv4 addresses, IPv6 addresses, CNAME records, nameservers, and reverse DNS results.

Enter a domain

Type a domain like example.com. The tool validates the domain before checking the headers.

Check DNS records

The checker looks up IPv4, IPv6, CNAME, nameserver, and reverse DNS details.

Review IP details

See which IP addresses are connected to the domain and whether reverse DNS hostnames are available.

Domain IP details this tool checks.

These checks help reveal where a domain points and which public IP addresses are connected to the website.

HST

IPv4 addresses

Shows the public A records connected to the domain.

CSP

IPv6 addresses

Shows AAAA records when the domain supports IPv6.

XFO

Reverse DNS

Shows hostnames associated with IP addresses when reverse DNS exists.

Domain IP lookup FAQ.

Quick answers about domain IP addresses, A records, AAAA records, CNAMEs, nameservers, and reverse DNS.

What does this domain IP lookup tool test?

It checks common HTTP security headers including HSTS, Content Security Policy, Reverse DNS, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy.

What is an A record?

An A record points a domain or subdomain to an IPv4 address.

What is an AAAA record?

An AAAA record points a domain or subdomain to an IPv6 address.

What is reverse DNS?

Reverse DNS checks whether an IP address maps back to a hostname.

Can a domain have multiple IP addresses?

Yes. A domain can have multiple IPv4 or IPv6 addresses, especially when using load balancing, CDNs, or redundant infrastructure.

Can HostDroplet help with DNS and hosting setup?

Yes. HostDroplet provides beginner-friendly hosting with SSL support, DNS guidance, performance-focused setup, backups, and helpful website support.

Need hosting with simple DNS setup?

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