The IRS publishes an online version of Publication 78, Cumulative List of Organizations, which is intended to assist you in learning if an organization is exempt from federal taxation and, if so, determining how much of your contributions to that organization are tax deductible.
The online version of Publication 78, Cumulative List of Organizations, is produced from computer records and is subject to certain limitations, particularly in the format and arrangement of the entries.
Organizations are listed only under the legal name (or recognized abbreviation such as 'VFW') currently listed with the Internal Revenue Service. Following the name is the address (city and state) used by the organization. No separate listings of 'common' or 'popular' names of organizations are included. However, some exceptions to the general rule may appear.