Americans calling the customer service lines of their airlines, phone companies and banks are now more likely to speak to Mark in Manila than Bharat in Bangalore.

Over the last several years, a quiet revolution has been reshaping the call center business: the rise of the Philippines, a former United States colony that has a large population of young people who speak lightly accented English and, unlike many Indians, are steeped in American culture.

More Filipinos — about 400,000 — than Indians now spend their nights talking to mostly American consumers, industry officials said, as companies like AT&T, JPMorgan Chase and Expedia have hired call centers here, or built their own. The jobs have come from the United States, Europe and, to some extent, India as outsourcers followed their clients to the Philippines.