US and international telephone directories

Telephone directory listings can be used to confirm the existence or location of a firm or individual.  Reverse address searches can identify other firms or individuals at a listed address, and thereby possible undisclosed ownerships and affiliations with other companies, as well as businesses located at “high risk” addresses (e.g., “mail drops.”)

US directories

www.yellowpages.com

www.whitepages.com

Canada directory

www.canada411.com

UK directory

www.192.com

International directories

www.wayp.com

www.infobel.com/teldir