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Contents   Fixed field   0xx   1xx   2xx   3xx   4xx   5xx   6xx   7xx   8xx   9xx

010  Library of Congress Control Number (NR)

       

Input Standards

Required if applicable/Required if applicable
1st Indicator  Undefined
blank character Undefined
2nd Indicator  Undefined
blank character Undefined
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards
‡a LC control number (NR) Required if applicable/Required if applicable
‡b NUCMC control number (R) Required if applicable/Required if applicable
‡z Canceled/invalid LC control number (R) Required if applicable/Required if applicable





Definition

The Library of Congress control number (LCCN) and/or canceled or invalid LCCNs. The LC control number was formerly called the LC card number, and they were first issued in 1898. Before January 2001, LCCNs consisted of a three-character prefix (often containing blanks), a two-digit year, a six-digit serial number, and a trailing blank. This number was often displayed with a hyphen separating the year and the serial number. After December 2000, LCCNs consist of a two-character prefix (often containing blanks), a four-digit year, and a six-digit serial number.

Guidelines

 
Data entry

Use the following guidelines to enter LCCNs in subfields ‡a, ‡b, or ‡z:

  • Post-2000 LCCNs. Enter a new LCCN or edit an existing LCCN with or without blanks in the prefix followed by the four-digit year, an optional hyphen, and the serial number. OCLC displays the LCCN without a hyphen.

    Example Enter post-2000 LCCNs Display
    No prefix 2001-234 or
    2001-000234 or
    2001000234 or
    __2001000234
    __2001000234
    1 character prefix a2002-3456 or
    a2002-003456 or
    a2002003456 or
    a_2002003456
    a_2002003456
    2 character prefix sn2003-45678 or
    sn2003-045678 or
    sn2003045678
    sn2003045678
    Note: The underscore ( _ ) represents a blank space in this table.

  • Pre-2001 LCCNs. Enter a new LCCN or edit an existing LCCN with or without blanks in the prefix followed by the two-digit year, an optional hyphen, the serial number, and an optional trailing blank at the end. OCLC displays the LCCN without a hyphen.

    Example Enter pre-2001 LCCNs Display
    No prefix 34-5678 or
    34-005678 or
    34005678 or
    ___34005678
    ___34005678_
    1 character prefix e45-67 or
    e45-000067 or
    e45000067 or
    e__45000067
    e__45000067_
    2 character prefix sn85-678 or
    sn85-000678 or
    sn85000678 or
    sn_85000678
    sn_85000678_
    3 character prefix agr25-3 or
    agr25-000003 or
    agr25000003
    agr25000003_
    Note: The underscore ( _ ) represents a blank space in this table.

  • Prefixes. Enter alphabetic prefixes with or without trailing blanks as lowercase letters immediately preceding the number. Do not enter LCCNs with the prefix nuc. Prefixes can be no longer than three characters in pre-2001 LCCNs and no longer than two characters in post-2000 LCCNs.

    LC copy Enter LCCNs Display
    E25-20 e25-20 or
    e25-000020 or
    e25000020
    e__25000020_
    SA68-11761 sa68-11761 or
    sa68-011761 or
    sa68011761
    sa_68011761_
    Agr22-346 agr22-346 or
    agr22-000346 or
    agr22000346
    agr22000346_
    Note: The underscore ( _ ) represents a blank space in this table.

  • Prefixes with four or more characters. Alphabetic prefixes with four or more characters are not valid. If such a prefix is found in LC copy, substitute the corresponding three-character equivalent in place of the original prefix as shown.

    Original prefix Enter prefix
    AFLN afl
    CA Dupl cad
    MicA mid
    Micp mie
    MicpA mif
    PhoM php
    PhomA phq

  • Single-digit years. If a pre-2001 LCCN contains a single-digit year, enter an initial 0 to produce a two-digit year. If you do not enter an initial 0, but do add a hyphen following the year, the system supplies the initial 0 in LCCNs without a prefix. If the LCCN contains an alphabetic prefix and a single-digit year, you must enter the initial 0 to produce a two-digit year.

    LC copy Enter LCCNs Display
    2-8520 2-8520 or
    02-8520 or
    02-008520 or
    02008520
    ___02008520_
    Agr3-1285 agr03-1285 or
    agr03-001285 or
    agr03001285
    agr03001285_
    Note: The underscore ( _ ) represents a blank space in this table.

  • Leading zeros following the hyphen. When the hyphen is present, you may enter or omit leading zeros in the serial number following the hyphen. If you do not enter the leading zeros, the system supplies them. If you do not enter the hyphen, you must enter the leading zeros.

    LC copy Enter LCCNs Display
    74-01513 74-1513 or
    74-001513 or
    74001513
    ___74001513_
    2001-34 2001-34 or
    2001-000034 or
    2001000034
    __2001000034
    Note: The underscore ( _ ) represents a blank space in this table.

  • Entering pre-1902 LCCNs. Before 1902, LC used various styles for LCCNs. For information about pre-1902 LCCNs that are not described here, contact the Library of Congress (LC Policy and Standards Division) or OCLC.

    • Cards issued in 1898. Some LCCNs issued in 1898 lack the year or have the prefix C and no year. Enter such LCCNs with the prefix and year as c98.

      LC copy Enter LCCNs Display
      398 c98-398 or
      c98-000398 or
      c98000398
      c__98000398_
      C-245 c98-245 or
      c98-000245 or
      c98000245
      c__98000245_
      Note: The underscore ( _ ) represents a blank space in this table.

    • Cards issued in 1901. Some LCCNs issued in 1901 have no year but have alphabetic prefixes other than C. Others may be preceded by 1. Enter the alphabetic prefix in lowercase letters followed by 01, the optional hyphen, and the rest of the number.

      LC copy Enter LCCNs Display
      F-3144 f01-3144 or
      f01-003144 or
      f01003144
      f__01003144_
      Rc-2100 rc01-2100 or
      rc01-002100 or
      rc01002100
      rc_01002100_
      1-Rc-990 rc01-990 or
      rc01-000990 or
      rc01000990
      rc_01000990_
      D-245 d01-245 or
      d01-000245 or
      d01000245
      d__01000245_
      1-Z-245 z01-245 or
      z01-000245 or
      z01000245
      z__01000245_
      Note: The underscore ( _ ) represents a blank space in this table.

  • Suffixes printed after or below the LCCN. Do not enter suffixes.

  • Alphabetic or phrase identifiers. Do not enter the alphabetic identifier CD or phrases such as Additions, Exception, Provisional, Cancel, and Brief Cataloging.

    LC copy Enter LCCNs Display
    64-7345CD 64-7345 or
    64-007345 or
    64007345
    ___64007345_
    2-10372 Additions 02-10372 or
    02-010372 or
    02010372
    ___02010372_
    Note: The underscore ( _ ) represents a blank space in this table.

  • Trailing asterisks, single daggers, or double daggers. Enter the LCCN only.

    LC copy Enter LCCNs Display
    8-30156* 8-30156 or
    08-30156 or
    08-030156 or
    08030156
    ___08030156_
    4-26834 † 4-26834 or
    04-26834 or
    04-026834 or
    04026834
    ___04026834_
    63-29455 ‡ 63-29455 or
    63-029455 or
    63029455
    ___63029455_
    Note: The underscore ( _ ) represents a blank space in this table.

  • Additional hyphens and slashes with trailing characters. The LCCN may be followed by a second hyphen and a single digit, by a second hyphen with an M and a single digit, or by a slash and a single digit. Do not enter second hyphens, slashes, or any of the characters following second hyphens or slashes.

    LC copy Enter LCCNs Display
    1-6360-1 1-6360 or
    01-6360 or
    01-006360 or
    01006360
    ___01006360_
    F-795-7 f01-795 or
    f01-000795 or
    f01000795
    f__01000795_
    2-2628-M2 2-2628 or
    02-2628 or
    02-002628 or
    02002628
    ___02002628_
    3-1444/4 3-1444 or
    03-1444 or
    03-001444 or
    03001444
    ___03001444_
    Note: The underscore ( _ ) represents a blank space in this table.

  • Revision information. Do not enter:

    • Rev or revised following the LCCN to the right of the printing symbol.
    • Unrev'd following the LCCN.
    • Revision dates. The printing symbol (located to the right of the rod hole on LC cards) may include the revision date.

    LC copy Enter LCCNs Display
    74-237323 rev 74-237323 or
    74237323
    ___74237323_
    74-5491 74[r75]rev 74-5491 or
    74-005491 or
    74005491
    ___74005491_
    F-1260 Revised [r35b2] f01-1260 or
    f01-001260 or
    f01001260
    f__01001260_
    1-1238 rev2 01-1238 or
    01-001238 or
    01001238
    ___01001238_
    8-3612             R [r77]rev4 08-3612 or
    08-003612 or
    08003612
    ___08003612_
    46-16977 rev2* ‡1 46-16977 or
    46-016977 or
    46016977
    ___46016977_
    CA8-3172 Unrev'd ca08-3172 or
    ca08-003172 or
    ca08003172
    ca_08003172_
    Note: The underscore ( _ ) represents a blank space in this table.
CONSER LCCNs

Records for serials and integrating resources that are part of the CONSER database (field 042 subfield ‡a coded as pcc, msc, nlc, nsdp, etc.) must contain a valid LCCN. CONSER uses some special prefixes for LCCNs in some records.

Pseudo LCCNs

LC and CONSER participants used LCCNs prefixed with sc, sf, and sn, referred to as pseudo LCCNs, as follows:

  • LCCNs with the prefix sc were used prior to 2000 in records for serials authenticated by LC, but not held by LC.
  • LCCNs with the prefix sf were used prior to 2000 in records for serials authenticated by LC and held by LC, but given less-than-full cataloging.
  • LCCNs with the prefix sn were used prior to 2000 in records for serials authenticated by CONSER participants and the National Serials Data Program (NSDP). LCCNs with the prefix sn were also used prior to 1984 for serials authenticated by LC and held by LC, but given less-than-full cataloging. LCCNs with the prefix sn are currently used by LC and the United States Newspaper Program (USNP) for cataloging newspapers.

Prior to May 1999, LC assigned unprefixed LCCNs to records for serials previously authenticated with pseudo LCCNs. The unprefixed LCCN would be added to subfield ‡a and the pseudo LCCN moved to subfield ‡z. LC now retains the pseudo LCCN in previously authenticated records it uses for cataloging.

LAC LCCNs

Library and Archives Canada (LAC) records for serials that are part of the CONSER database use LCCNs prefixed with ce, cf, and cn as follows:

  • LCCNs with the prefix ce are used in records for bilingual serials cataloged in English
  • LCCNs with the prefix cf are used in records for bilingual serials cataloged in French
  • LCCNs with the prefix cn are used in records for non-bilingual serials cataloged in English or French

The LAC LCCNs used in the CONSER database are derived from the LAC control number in field 016. When a bilingual serial is cataloged in both English and French the same number will appear in each LCCN following the ce and cf prefixes.

1st Indicator

Undefined. The 1st indicator position is undefined and contains a blank ( blank character ).
 
blank character Undefined

2nd Indicator

Undefined. The 2nd indicator position is undefined and contains a blank ( blank character ).
 
blank character Undefined

Subfields

A canceled or invalid LCCN must be entered in subfield ‡z, not subfield ‡a. If in doubt, use subfield ‡z.

‡a LC control number  

Assume that the LCCN on LC cataloging copy or in a publication is valid unless one of the circumstances described in subfield ‡z applies.

010        51016967 ‡z sn 90000198
‡b NUCMC control number  

A valid number for the item as found in the National Union Catalog of Manuscript Collections (NUCMC). The form printed in NUCMC contains the prefix ms, two-digit year, hyphen, and serial number, e.g., ms70-491 or ms68-2403. The NUCMC control number is entered and displayed like all other LCCNs.

Any canceled or invalid NUCMC control numbers are in subfield ‡z. Pre-1988 records may have NUCMC control numbers in subfield ‡a.

010     ‡b ms 60002471
‡z Canceled/invalid LC control number  

Canceled or invalid LCCNs. Use also if the accuracy of the LCCN is in doubt. If one of the following conditions exists, the LCCN is invalid:

  • The item is a new edition but is printed with the LCCN of a previous edition.
  • The item is cataloged separately but is printed with the LCCN of the multipart monograph or series of which the it is a part.
  • The printed LCCN has an obvious typographic error (e.g., the printed LCCN differs from the LCCN found in the LC catalog), but the LCCN is still structurally correct (e.g., a two- or four-digit year followed by a serial number of up to six digits).
  • LC used the same LCCN in a record for a different item.

OCLC also uses subfield ‡z to record the LCCN of former LC or CONSER records when they are deleted in merging records.

010     ‡z    82022174
[LCCN for an earlier edition in a record for a later edition]
010     ‡z    68013470
[LCCN for a print version in a record for a photocopy reproduction]

Printing

Field 010 subfield ‡a prints in the lower right corner (bottom line).
 

If a particular catalog entry requires two or more physical cards (continuation cards), the LC control number prints on the final card.

This page last revised: March 31, 2014