Area code 646 is an overlay for Manhattan’s iconic 212 area code in New York City. Introduced in 1999, 646 was created to accommodate the growing need for phone numbers in the densely populated borough. It shares the same geographic coverage as 212 and 332, with ten-digit dialing required across all of Manhattan. While it may lack the vintage prestige of 212, 646 has become common for newer businesses, mobile lines, and residents. It is frequently seen in the city’s tech and startup sectors. As part of Manhattan’s telecommunications network, 646 is firmly entrenched in the city’s modern digital identity.