IP checker
Members onlyFind out who runs any IP address, where it is, whether it's a VPN, proxy or data centre, its reverse DNS and whether it's on an email blocklist. Handy for working out where an odd email or sign-up really came from.
Only the address is looked up. Nothing is kept beyond a count for your daily allowance.
Example report
185.70.42.12
A mail server, not listedRun by a hosting company in Switzerland.
✓OrganisationProton AG
✓CountrySwitzerland
✓Reverse DNSpoints back
!VPN or data centredata centre
✓Blocklistsnot listed
What it checks
Who holds it
The organisation, the address block, the network and the country, from the registry.
Is it hiding something
Whether it's a VPN, proxy, Tor exit or data centre, with why we think so.
Can it send email
Its reverse DNS and whether it's on the email blocklists inbox providers use.
Got an email that went missing?The email header reader traces it hop by hop. Open to everyone.Read email headers