Apple has sold some 250 million iOS devices since the first iPhone was released in 2007. The news came from Apple CFO Peter Oppenheimer during the company’s Q4 earnings report Tuesday afternoon.

Apple’s iOS lineup includes the iPhone, iPad and iPod touch. US$11 billion of the quarter’s revenue came just from iPhone sales, and the iPhone 4S wasn’t yet available.

The Mac, iPhone and iPad maker broke its own quarterly revenue records yet again with $28.27 billion, and a $6.62 billion profit. Gross margins for the quarter came in at 40.3 percent, up from 36.9 percent compared to the same quarter last year.

Some 92 percent of the Fortune 100 companies are currently testing iPads for deployment in their businesses, up from 86 percent last year.

With the iPhone 4S out and available now, analysts expressed concern over Apple’s ability to produce enough inventory to meet demand especially during the holiday buying season. CEO Tim Cook, however, said he is confident Apple will be able to meet demand, and that the company has “a solid inventory.”

Apple is currently trading at $394.83 after hours, down 27.41 (-6.49%).

[This article has been updated to show the total number of devices sold instead of this quarter.]