In American usage, a periodical publication's nameplate is its designed title as it appears on the front page or cover. Another very common term for it in the newspaper industry is "the flag." In the United Kingdom, as well as in many other Commonwealth nations, this is known as the publication's masthead.
In American usage, the term masthead refers to a printed list - published in a fixed position in each edition of a periodical - of its owners, departments, officers, and address details. This same feature is in British English usage referred to as the periodical's imprint.