this one
Some months ago the Copyright Office and Library of Congress telephone number -except the Copyright Public Information people – changed the first three digits of their telephone numbers. Current numbers for some of the most frequently called numbers are:
Public Information:
(202) 479-0700
Forms & Circulars Hotline:
(202) 707-9100
Reference & Bibliography Section:
(202) 707-6850
Certifications & Documents Section:
(202) 707-6787
Copyright General Counsel's Office:
(202) 707-8380
Documents Unit:
(202) 7071759
Licensing Division:
(202) 707-8150