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, DNS provider clues, 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 Nameserver Lookup Tool

Free nameserver checker for checking domain DNS authority.

Check which nameservers a domain is using, review SOA details, detect Cloudflare nameservers, and troubleshoot domain hosting setup.

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

How the nameserver checker works.

This tool queries public DNS records and returns the domain's nameservers, SOA details, Cloudflare detection, and DNS response information.

Enter a domain

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

Check nameservers

The checker looks up NS records and SOA details from public DNS.

Review nameserver details

See which nameservers control the domain and whether SOA information is available.

Nameserver details this tool checks.

These checks help reveal which DNS provider controls a domain and whether nameserver records are visible.

HST

NS records

Shows the current nameservers assigned to the domain.

CSP

SOA record

Shows Start of Authority details when available.

XFO

DNS provider clues

Can help identify Cloudflare or hosting provider nameservers.

Nameserver checker FAQ.

Quick answers about nameservers, NS records, SOA records, DNS propagation, and hosting setup.

What does this nameserver checker test?

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

What is a nameserver?

A nameserver controls where DNS records for a domain are hosted and answered from.

What is an NS record?

An NS record tells the internet which nameservers are authoritative for a domain.

What is an SOA record?

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

Can a domain have multiple nameservers?

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

Can HostDroplet help with nameserver setup?

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

Need hosting with simple nameserver setup?

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