Is the company located in the US?

National directories focus on the companies of an individual country. In general, these individual country directories tend to include more listings for that particular country than do directories of international scope.

To retrieve such directories from CATNYP (The Research Libraries' Online Catalog), simply include the country name in your search query, along with such terms as corporations, business enterprises, industries, etc. Browsing the list of worldwide business directory sources (alphabetically organized by country name) will also give you a good idea of what is available onsite at SIBL.

Reference USA (EIC)
Includes addresses and sales information for over 10 million U.S. companies. Very useful for locating smaller businesses as it includes companies of all employee sizes and annual sales ranges.

D & B Million Dollar Directory
(near McGraw Desk; *R-HC102 .D8 or EIC)
Includes 160,000 alphabetically-arranged large ($500,000+ net worth, 250+ employees, or $25,000,000+ sales) public and private companies. Also available in the EIC: Dun's Business Locator)

Yahoo! Business and Economy: Companies: Directories: Regional: U.S. States
http://dir.yahoo.com/Business_and_Economy/ Directories/Companies/
Provides links to business directories and yellow pages that are subdivided by geographical location and which can be searched by company name, business type, location.