Type 800 number for company, substituting the name of the business you're looking for for the word "company," and sometimes you'll get lucky.
Pịnye "nọmba 800 maka ụlọ ọrụ," na-etinye aha azụmahịa ị na-achọ maka "ụlọ ọrụ," mgbe ụfọdụ, ị ga-enwe obi ụtọ.