What is what area code is 646?

Area code 646 is a telephone area code in the <a href="https://www.wikiwhat.page/kavramlar/New%20York%20City">New York City</a> borough of <a href="https://www.wikiwhat.page/kavramlar/Manhattan">Manhattan</a>. It is an overlay area code, meaning it shares the same geographic area as other area codes. Specifically, it overlays area codes <a href="https://www.wikiwhat.page/kavramlar/212">212</a> and <a href="https://www.wikiwhat.page/kavramlar/917">917</a>. It was introduced in 1999 to alleviate the exhaustion of phone numbers in Manhattan. When dialing a number in Manhattan, you must use 10-digit dialing (area code + phone number) regardless of whether you are calling from the same area code.