See at a glance how
the world sees your domain
NetTrace queries your DNS records at 84 public resolvers simultaneously and shows exactly where answers differ. Plus email, security and blacklist checks.
All tools
From a single record lookup to a full security scan of your mail domain.
DNS checker
Query 13 record types at 84 resolvers and see each answer, response time and status.
Open →Mail checker
SPF, DMARC, DKIM, MX, PTR and BIMI at once, plus disposable domain detection.
Open →Security scan
A score for email, web and DNS security: TLS certificate, HSTS, DNSSEC, CAA, MTA-STS and TLS-RPT.
Open →Blacklist check
Check an IP address or domain against well-known DNS blacklists, including the listing reason.
Open →IP info
Hostname, ASN, network owner and location of any IP address or domain.
Open →Built on measurable speed
Every resolver gets its own strict timeout, so one slow server never delays your answer. Answers are cached according to their own TTL, and identical concurrent questions share a single upstream lookup.
- All 84 resolvers queried at once, each with its own timeout
- Results appear live as they arrive
- TTL-based cache per resolver, complete checks for at least 30 s
- Honest status per resolver: ok, timeout, refused or NXDOMAIN
| Resolver | Status | Time |
|---|---|---|
| Cloudflare | OK | 1 ms |
| Quad9 | OK | 2 ms |
| Tele2 NL | OK | 18 ms |
| KT Corp (KR) | OK | 262 ms |
| Pacific Internet (AU) | OK | 301 ms |
Illustration of the results view, not a measurement.
An open API, no account needed
The same checks as on this site, through a simple REST API. Great for scripts, monitoring and your own tools. A fair rate limit keeps the service fast for everyone.
API documentation# DNS lookup at all resolvers curl -X POST https://api.nettrace.eu/v1.0/dns-check \ -d "domain=nettrace.eu" \ -d "recordType=A" # Live results as NDJSON curl -N -X POST "https://api.nettrace.eu/v1.0/dns-check?stream=1" \ -d "domain=nettrace.eu&recordType=MX"