Library of Congress Control Number


August 13, 2022

Library of Congress Control Number (LCCN) is an identifier published by the United States Library of Congress. This can be used as a counterpart to ISBN and should not be confused with Library of Congress Classification (LCC). Based on the structure of the LCCN is the Library of Congress Name Authority File (LCNAF), a counterpart to Gemeinsame Normdatei (GND). The Library of Congress Control Number can also be used in permalinks. In the WikiData project, LCCN can be used as an explanation for the entries., an example LCCN of Vincent van Gogh:Q5582 is n79022935.


Originally they spoke of Library of Congress Catalog Card Number. This number system has been in use since 1898. Before 2000, a two-digit year designation was used (structure A) and from the beginning of 2001 a four-digit year designation (structure B). With which the ambiguous years such as 1898 can be distinguished by the size of the serial number. Between the years 1969 and 1972 there has been a failed experiment that allows these numbers to start with a "7". Over the years there have been developments that are normalized to one standard designation.


The structure of LCCN looks like this:

See also

Gemeinsame Normdatei (GND) International Standard Book Number (ISBN)

External links

(en) LCCN page at Library of Congress