Mayor Bill de Blasio says New York City’s customer service hotline had its busiest year ever in 2014.

The 311 line received over 28 million customer contacts. It surpassed the previous high, set in 2011, by 16 percent.

New Yorkers can use the number to get information on a wide range of city services and issues.

They include reporting a lack of heat, enrolling in pre-kindergarten and checking on alternate side of the street parking regulations.

Most customers call 311 but the service can also be accessed online or by texting.

The 311 service was created by de Blasio’s data-driven predecessor, Michael Bloomberg, in 2003.

Its call center is in Lower Manhattan. The website can accommodate more than 50 languages.

(AP)