Now with NAICS and SIC codes!

Sources: 5,200 Yellow Page and Business White Page Directories Federal, State, City & County Government Data Bankruptcy records and legal filings Leading business magazines, newspapers and company newsletters Annual reports 10Ks and other SEC filings New business registration and incorporations Postal service information including National Change of Address, ZIP+4 carrier route and Delivery Sequence Files 16 million phone calls to verify the information. Every business is called one to four times a year.