Free Online Tools for Network Diagnostics

Fast, Simple, and Powerful Network Analysis Tools

dns

DNS Record Checker

Query DNS records instantly

Support A, AAAA, CNAME, MX, TXT, NS records with multiple DNS servers.

A AAAA MX TXT
lock

SSL Certificate Checker

Inspect certificate validity and issuer

Check expiry date, issuer, SAN domains, self-signed status and certificate chain details.

HTTPS TLS SAN Expiry
language

IP Lookup

Get IP information

Get detailed information about any IP address including location, ISP, and network details.

Coming Soon
router

Port Scanner

Check common TCP port status

Scan one host with custom port list and return open/closed status with latency.

80 443 22
security

HTTP Security Headers

Check HSTS/CSP/XFO headers

Inspect key response security headers and identify missing protections.

HSTS CSP XFO
mail

Mail Security Checker

SPF, DKIM and DMARC lookup

Validate email DNS security policies and quickly find missing records.

SPF DKIM DMARC
speed

Lightning Fast

Get instant results with our optimized infrastructure

lock_open

100% Free

No registration, no limits, completely free to use

verified_user

Accurate Results

Reliable data from multiple authoritative sources

Built with Ethan X. for network professionals and developers