Library of Congress

Preassigned Control Number Program

The Library of Congress > Preassigned Control Number Program > About PCN

Eligibility

Only U.S. book publishers are eligible to participate in the PCN Program.

These publishers must list a U.S. place of publication on the title page or copyright page of their books and maintain an editorial office in the U.S. capable of answering substantive bibliographic questions.

These authors must list a U.S. place of publication on the title page or copyright page of their books and have a U.S. phone number that can be easily reached to answer any bibliographic questions.