Tools

BIMI Record Checker

Check a domain's brand logo indicator setup.

MTA-STS Checker

Verify enforced TLS for inbound mail.

TLSRPT Checker

Check TLS delivery failure reporting.

DMARC Aggregate Report Parser

Turn a raw RUA XML report into a readable table.

What Is My IP

See your own public IP address.

A Record Lookup

Look up a domain's IPv4 address.

AAAA Lookup

Look up a domain's IPv6 address.

CNAME Lookup

See what a domain or subdomain aliases to.

NS Lookup

See which nameservers are authoritative for a domain.

SOA Lookup

Check a domain's zone settings.

SRV Lookup

Find the host and port for a network service.

CAA Lookup

See which certificate authorities may issue for a domain.

Reverse DNS Lookup

Find the hostname behind an IP address.

DNSSEC Validation Checker

Check whether a domain's DNSSEC chain of trust is valid.

HTTPS Lookup

Check a site's TLS certificate and connection.

Robots.txt AI Policy

See which AI crawlers are allowed or blocked.

LLMs.txt Lookup

Check for a published llms.txt file.

ASN Lookup

Find which network announces an IP.

Whois Lookup

Look up a domain's registration details.

DMARC Policy Builder

Build a correct DMARC record from your choices.

SPF Include Adder

Safely add a new mail vendor to your SPF record.