Some businesses and government agencies have directories posted on their websites to help people find addresses of certain offices. Businesses and government agencies also list their office addresses in telephone books. Calling an office is an effective way to acquire its address.
Websites such as Whitepages allow people to look up business and government agency addresses with partial information such as the business or agency name, city, state or ZIP code. Local chambers of commerce make business office addresses available to the public. Office addresses can also be found on invoices, receipts, bills and on marketing materials such as newsletters and fliers.