Additional Notes On How To Use This Site
When entering your list, either manually or using a text file, the tool will except the following domain address
Note: these should all be in lower case
So there is no need to spend time making the list uniform if you have copied and pasted it from a variety of
The tool will also accept page and directory domain names, e.g.
A Y in the Class C Duplicate column means that there is at least one
other domain in the list with the same class c block address, e.g.
66.225.255.xyz and 66.225.255.xyz where xyz can be any number
A Y in the Subnet Duplicate column means that there is at least one
other domain in the list with the same class c block subnet address, e.g.
188.8.131.52 and 184.108.40.206
If you click on the report column headers (Domain URL, IP Address, Class C Duplicate or Subnet Duplicate) the
report will sort for that column, click again and it will sort in the opposite order.
This is useful when you have a very long list of domains and you want to bring the duplicate to the top of the
If you want to do a quick test of the tool before building your own domain
list copy and paste the sample list below:
Always use the Clear All button between loading different domain lists to ensure results integrity.
There is no specific limit to the number of domains that can be tested.
During testing of the tool a list of 220 domains was checked in 5-10 seconds on an ordinary residential
broadband internet connection. Obviously if a dialup connection is used the processing time could be longer.