Live
DNS Lookup
Check A, AAAA, MX, NS, CNAME and TXT records for any domain.
Open tool →Free website diagnostics
Check domains. Diagnose problems. Fix them faster.
Practical DNS, domain, SSL, email and website tools for website owners, developers and support teams — with clear explanations when something goes wrong.
No signupFast checksPlain-English results
domain example.com
record A
✓ 93.184.216.34
resolver public DNS
status healthy
Toolbox
Start diagnosing
Fast checks built around the domain and website problems people actually face.
Live
DNS Propagation Checker
Compare DNS answers from Google, Cloudflare and Quad9 public resolvers.
Open tool →Live
SSL Checker
Inspect a website certificate, expiry date, issuer and common SSL problems.
Open tool →Live
MX Lookup
Find the mail servers responsible for receiving email for a domain.
Open tool →Live
HTTP Status Checker
Check response codes, redirects, final URLs and response times.
Open tool →Live
Domain Lookup
Inspect public registration data, registrar, status and important domain dates using RDAP.
Open tool →Live
What's My IP?
See the public IP address your browser is using to reach this site.
Open tool →Learn while you fix
Clear answers, not networking jargon.
Every diagnostic tool is paired with guides that explain the result, likely causes, and safe next steps. That gives us useful content for search traffic without turning the site into a generic tech blog.
Read: DNS records explained →7working tools at launch
0accounts required
1goal: diagnose faster