A set of useful tools to verify DNS servers resolutions. You can verify a domain’s propagation on a local or global scale and you can obtain the IP of an hostname or vice-versa.

    
    

Check the propagation and resolution
of any hostname.

Our API has many endpoints with which you can verify an hostname’s propagation through the global DNS servers or through a specific nation.

Verify an hostname resolution through a default DNS server or specify your own.

Get the list of IP addresses of an hostname or specify an IP address and verify if there’s an hostname associated with it.

The DNS list used to verify the propagation of an hostname is updated daily and customized to allow only active and reliable DNS servers.

Security is a priority on SFour. All the data to and from our systems are encrypted with 256-bit SSL algorithms (HTTPS).

FREE

0
no card
required!
  • 25 requests/month
  • 1 request/minute

BASIC

7
per
month
  • 25 requests/month
  • 1 request/minute
  • Commercial use allowed

STARTER

14
per
month
  • 1,000 requests/month
  • 1 request/second
  • Commercial use allowed

PRO

36
per
month
  • 6,000 requests/month
  • 50 requests/second
  • Commercial use allowed
SFour logo

Easy implementation Speed and scale Uptime and reliability

You're a bit EARLY

We’re not quite ready yet, but you can join our Early Birds waitlist and be among the first to gain access. For free.

* We are developers and we suck at marketing, that means our emails will be kept at a minimum and be straight to the point.