Network tools let you check and diagnose the building blocks of an internet connection — IP addresses, domains, DNS, and HTTP responses — right in your browser. Use them to narrow down exactly where something breaks: a server check, a domain migration, or a bounced email.
What are network tools?
When you open a website, the domain is resolved through DNS into an IP address, and the server at that IP answers with HTTP headers and content. If any step goes wrong, you see symptoms like “the site won't load” or “my email bounces.” The tools in this category isolate each step — your IP → DNS records → domain-to-IP mapping → HTTP headers → certificates — so you can pin down the failing point one stage at a time. Every lookup uses public information and runs in your browser, with nothing to install.
When to use them
- Check your IP & location — confirm whether a VPN/proxy is actually applied and which country your connection appears from
- After a domain migration or DNS change — use DNS Lookup and Domain to IP to verify traffic reaches the new server
- When email bounces — use Email Verifier (MX records) to check whether the receiving domain can accept mail
- Site security review — use the Security Headers Checker to see whether HSTS, CSP and other headers are set
Frequently asked questions
- Is the domain/IP I look up stored?
- No. Lookups query public DNS, RDAP and similar services only at request time, and your input is not retained.
- I changed my DNS — why do I still see the old IP?
- DNS changes propagate worldwide over time. Depending on the TTL, the old value can linger anywhere from a few minutes to many hours.