Frequently Asked Questions

How to speed up a bit the process/test?


Beware, when talking about speed a lot a thing have to be taken in consideration. Indeed here is a non exaustive list of things which fluctuate testing speed.

  • Internet speed.
  • DNS Server response time.
  • CPU.
  • ISP blocking a big amount of connection to the outside world.
  • Our databases management (do not apply for MySQL and MariaDB format).
  • Amount of data to test.

I have multiple CPU

Simply use the --multiprocess argument to activate the usage of multiple processes. You can in addition of that use the --processes argument to tell us the number of simultaneous process to run.

I do not have multiple CPU

We invite you to disable the usage/request of the WHOIS record.

This action will let the script speed up because we only use the equivalent of nslookup and the HTTP status code to determine the status.


We use/request the WHOIS record in order to avoid a specific false positive case. Indeed, if we disable the usage/request all domains which are still registered but not assigned to a specific IP will be flagged as INACTIVE.

It’s not a problem if you keep/use the database system because the domain will be retested over time. But please keep in mind that without the database system we do not guarantee an accurate result.