In the U.S., phone numbers have seven digits, plus an area code. See the example below. The number zero ( "0") is usually pronounced "oh." Some people may pronounce "zero." We say the area code as single digits: area code nine-one-seven.

There are two ways to say extension 215. One is extension two-one-five, and the other is extension two-fifteen. If two digits are the same, some people may use "double" to say the same two numbers such as 7700, double seven double oh.

Play all the sentences and repeat three times. Listen and improve listening comprehension.