30 years. Prior to October 2021, area code 414 had telephone numbers assigned for the central office code 988. In 2020, 988 was designated nationwide as a dialing code for the National Suicide Prevention Lifeline, which created a conflict for exchanges that permit seven-digit dialing. This area code was therefore scheduled to transition to ten-digit dialing by October 24, 2021. Until then, Milwaukee had been one of the largest cities where seven-digit dialing was still theoretically possible, since 414 had been one of the last urbanized area codes without an overlay. In popular culture The area code gained infamy in 1983, when a gang of six Milwaukee-area teenagers, calling themselves The 414s, broke into several high-profile computer systems across the United States and Canada. The City of Milwaukee officially started celebrating Milwaukee Day in 2009. It is celebrated on April 14, or "4/14", in honor of Milwaukee's area code. When the Milwaukee Brewers have a home game on the day at American Family Field, many of the tickets are priced at $4.14 in honor of the day to encourage attendance during April, when the season starts and games outside Opening Day outside rivalries are less attended. Due to the 2022 Major League Baseball season being delayed due to a lockout, that year's home opener against the rival St. Louis Cardinals occurred on April 14 (though with a reduced allocation of $4.14-priced tickets), and the game's first pitch was thrown at 4:14 p.m. Central. The Milwaukee Bucks' new arena, Fiserv Forum, was nicknamed the "Four-One-Forum" by fans in an homage to the area code. See also List of NANP area codes References External links 414 414 Telecommunications-related introductions in 1947