How to quickly find and export all subdomains indexed by Google

Old & Manual Technique:

1. Start with "Site:" and the root domain

2. Remove each subdomain (including:"www") from the results with the "-inurl:" operator

3. When there are no more results for google to return, your query with the search operators should include all subdomains indexed.

However, this technique has its limits. It’s unlikely that the site you’re auditing has as many subdomains. This can potentially cause the following issues:

a. The process can be long, especially if it needs to be done for several domains.

b. You might get Google “captchas” along the way.

c. The size of queries is limited (around 30 keywords). Thus, if your query is too long (too many -inurl operators), you will get a 400 error page from Google.

A simple solution : A Chrome extesnion by google

Chrome extesnion : personal Blocklist by Google

https://chrome.google.com/webstore/detail/personal-blocklist-by-goo/nolijncfnkgaikbjbdaogikpmpbdcdef

It allows you to block domains from appearing in your search results.

1. Once added to Chrome, start with the same “site:domain.com” search command.

2. Under each result now appears a “Block subdomain.domain.com” link.

3.Click on each link until your result page is empty.

4.You’re almost done! Simply click on the extension icon, then “export,” then copy/paste into Excel.