Appendix F
The ISSN (International Standard Serial Number) is an internationally used identification number for serial publications. Serials include magazines, newspapers, journals, annuals, yearbooks, and series — a broader range of publications than those eligible for Periodicals mailing privileges. Once assigned, the ISSN remains the same for the life of the serial, regardless of changes in publisher or place of publication. However, if the title of the serial changes, a new ISSN is usually assigned.
ISSNs are assigned by national ISSN centers in over 70 countries worldwide. In the United States, the National Serials Data Program, an office within the Library of Congress, is responsible for assigning ISSNs.
Applications for Periodicals Mailing Privileges are reviewed by the Library of Congress for possible ISSN assignment; therefore, no separate application by the publisher is necessary.
Publishers who wish to apply for an ISSN before filing the application for Periodicals mailing privileges can download an application from the Library of Congress website at www.loc.gov/issn. After completing the application, mail it with a copy of the publication or a photocopy of the cover or title page and masthead directly to the Library of Congress at the address on the form:
Please allow 6–8 weeks for ISSN applications to be processed.
