Library of Congress

Cataloging Distribution Service

The Library of Congress > Cataloging Distribution Service > Classification Web > Contact

For the quickest response to your Classification Web questions or comments, email us at cdsinfo@loc.gov.


CDS Customer Service

Hours: 8:00 am – 4:30 pm
Monday-Friday
Excluding federal holidays

Library of Congress
Office of Business Enterprises
Cataloging Distribution Service
101 Independence Avenue, SE
Washington, DC 20540-4910

Phone: 1-855-266-1884 (U.S. Only)
or +1-202-707-6100

Fax: 202-707-1771

Email: cdsinfo@loc.gov