33401

The area code 33401 is a designated United States geographic area code serving the northwestern part of Florida, specifically the city of Jacksonville. It is used by the North American Numbering Plan Administration to facilitate communication between regional and long-distance phone networks. This particular area code is one of the original 86 area codes established in 1947 when the numbering plan was first implemented.

Geographically, the 33401 region is comprised of parts of the downtown and surrounding areas within Jacksonville, including the neighborhood of Riverside. The Jacksonville city limits span from the St. Johns River to the Atlantic coast, covering over 875 square miles of land. As of 2022, the Jacksonville metropolitan area has a population of approximately 1.6 million residents.

Area code 33401 has undergone several changes since its inception. In 1999, due to an anticipated future shortage of new area codes following the 1997 NPA Numbering Plan (an update to the initial 1947 plan), the existing 904 area code serving most of northeast Florida was split. This led to the introduction of area code 904, which encompasses nearly all of the region except the parts covered by area code 406. Area code 904 further increased its influence with additional boundary adjustments around 2002, expanding to nearby areas.

Residents and businesses within the designated area code 33401 exchange numbers serving as a legitimate regional allocation following guidelines to sort long-distance phone usage by an update to, or split with, previously existing area codes such as 904 or 406, and exhibiting regional communication relied, with merged practices in widespread commercial suitability options.