This excerpt taken from the YHOO 10-K filed Mar 3, 2006.
Item 2. Properties
Our headquarters is located in Sunnyvale, California and consists of owned and leased space aggregating approximately 1 million square feet. Office space is also leased in Amsterdam, Bangalore, Buenos Aires, Calgary, Copenhagen, Dublin, Dusseldorf, Echirolles, Hamburg, Hong Kong, London, Oslo, Madrid, Melbourne, Mexico City, Milan, Montreal, Mumbai, Munich, New Delhi, Osaka, Paris, São Paulo, Seoul, Singapore, Stockholm, Sydney, Taipei, Tokyo, Toronto and Trondheim. We also lease offices in various locations in the United States, including Atlanta, Berkeley, Boston, Chicago, Columbus, Dallas, Detroit, Hillsboro, the Los Angeles Area, Miami, New York, Orlando, Reston, the San Diego Area, the San Francisco Bay Area, the Seattle Area, and Washington, D.C. Our datacenters are operated in locations in the United States, Europe and Asia.
We believe that our existing facilities are adequate to meet current requirements, and that suitable additional or substitute space will be available as needed to accommodate any further physical expansion of operations and for any additional sales offices.