Contact Information - ClassWeb

Library of Congress
Cataloging Distribution Service
Classification Web

For the latest Classification Web product information:
Check the ClassWeb product site on the CDS World Wide Web catalog.

To receive updates about Classification Web:
Join the ClassWeb listserv to receive the latest information on ClassWeb.

Product support:
For questions about how to use ClassWeb or if you are having technical problems:

  • For detailed information on how to use Class Web check the ClassWeb Help Pages .
  • For technical questions, first check the ClassWeb FAQS.
  • If the information provided in either of these sources is insufficient to resolve your problem send an email to and a member of the technical support staff will contact you as soon as possible.

For the latest information on all CDS products:
Check the CDS Web site at:

To offer comments and suggestions about the Classification Web product contact:

Library of Congress
Cataloging Policy and Support Office
Washington, DC 20540-4305

FAX: (202) 707-6629

For product orders and all other correspondence, contact CDS at:

Library of Congress
Cataloging Distribution Service
Customer Services Section
Washington, DC 20540-4912

Phone: (855) 266-1884 (US only)
  or (202) 707-6100
FAX: (202) 707-1771