Boston Public Library
Kirstein Business Library

Second Floor, McKim Building, Central Library, 617-859-2142

Online Business Directories


Business Directories – Massachusetts

City of Boston DBA Database Search

Blue Book of Building & Construction
Directory of construction-related businesses including contractors, engineers, manufacturers, and suppliers. Regional editions online include “Eastern Mass./Rhode Island/Southern New Hampshire” and “Western Mass./Connecticut”, plus other regions from around the country.

Greater Boston Chamber of Commerce – Membership Directory
Search for over 1,700 member companies by name, industry, or contact person. Each listing provides address, phone number, fax number, contact person, and sometimes an e-mail address and description of the company.

Smaller Business Association of New England
Membership directory of over 1200 member companies in six states ranging in size from sole-proprietorships to 500 employee manufacturing plants.

State Chartered Banks & Credit Unions (Massachusetts)
From the Massachusetts Division of Banks.

State Office of Minority and Women Business Assistance
Search online or download the directory of minority- and women-owned businesses in Massachusetts. SOMWBA promotes the development of these businesses and provides useful links for business owners.

Additional information about directories of companies in Massachusetts available at the Kirstein Business Library.


Business Directories – United States

Central Contractor Registration
Government database of current or prospective Department of Defense vendors. Searchable by name, industry, geographic location or socio-economic factors.
A database of federal contracts and grants. With this database you can search for a specific contractor by name, all contracts within a state or congressional district, or those awarded by a particular agency. Data includes granting/contracting agency, name of grantee/contractor, date, amount & purpose of grant/contract and other information.

Hoover’s Online
Database of basic information on over 10,000 companies in the U.S. Other useful features include links to SEC filings, various business rankings, and corporate web sites.

Manta Essential Business Information on Demand
Search for directory information on more than 45,000 companies worldwide. Data comes from D&B, Datamonitor and other publishers.

RN/WPL Numbers
The Federal Trade Commission’s Registered Identification Number Databases are useful for identifying and locating companies whose textile products bear these numbers on their labels. Also provides a link to CA numbers (for Canadian companies).

Thomas Register Online
Online version of Thomas Register of American Manufacturers. Membership is required but free.


Business Directories – International

Over 500,000 companies from 30 European countries and a few non-European countries (Egypt, Israel, Lebanon, & Morocco). Search by product or by company name and limit your results by any or all countries. Provides name of company, address, telephone and fax numbers.

Kompass International Directories
This free version of the Kompass directories provides addresses & telephone numbers for businesses in over 60 countries. For extended information such as financials and contact persons, a fee-based subscription is also available.


Professional Directories

Massachusetts Society of Certified Public Accountants
Search by accountant’s name or get listings of CPA’s by city. Contact information provided includes accountant’s name, firm, address, telephone, fax, and website.

A database of 450,000 CPAs and firms searchable by name, city or services.

Martindale-Hubbell Lawyer Locator
Directory of lawyers and law firms.

West Legal Directory

Massachusetts Board of Registration in Medicine On-Line Physician Profile Site
Locate individual physicians and get background information (education, publications, specialties) for doctors on file with the Massachusetts Board of Registration in Medicine. Links to other states available at


Telephone Directories
Search for names, addresses, and phone numbers of over 16 million businesses across the U.S. in this “Yellow Page” database. This site can also find phone numbers and e-mail addresses of individuals.
International Telephone Directories

Online telephone directory of over 90 million individuals and over 10 million businesses (search by name or business category).

Additional information about telephone directories available at the Kirstein Business Library.