There are 8 million phone numbers in the naked city. And no matter who you were calling in San Jose — or large swaths of the South Bay — for the past half century, you’ve had to dial this: area code ...

Silicon Valley has had the 408 area code for 52 years. But the proliferation of cell phones, ATMs and even in-car navigational devices has exhausted the supply of numbers. "I like 408, and it is part ...