Many professional organizations or societies maintain websites that provide information on their mission, scholarly activities, and publications.
It's a good idea to check the organization/society website to confirm this information, since disreputable publishers may falsely claim their publication is affiliated with a scholarly organization.
Use Google, search the "name of the organization" within quotation marks. Check the website to see if they provide information about their mission, publications, activities.
University or College
Is the journal affiliated with a university? Since predatory journals may list universities as affiliates without the university's permission, check the university’s web site.
Run a Google search of the "journal name" AND "the name of the university". Make sure that the results contain a webpage to the journal originating from the correct university/college URL.