IRS 501(c)(3) Search
What is a IRS 501(c)(3) Search?
The IRS regularly publishes information related to operating 501(c)(3) organizations which can be searched on the IRS website.
You can find a list of operating 501(c)(3)s, determination letters, form 990 returns, and more.
The majority of information relating to any particular 501(c)(3) is generally public information.