Codeseven was formed in 1995 as a melodic hardcore band in Winston-Salem, North Carolina. Their first release, A Sense of Coalition gained popularity on college radio stations for an intense cover of Don Henley's "The Boys of Summer" (not to be confused with the Ataris' cover of the same song that became a mainstream radio hit years later).

With subsequent releases Division of Labor and The Rescue, the band continually became less aggressive and more melodic, eventually abandoning their hardcore roots in favor of progressive, experimental space rock, much as Cave In had done.

Their final album, Dancing Echoes/Dead Sounds was released in 2004 on Equal Vision. In 2005, the band broke up in order to pursue different opportunities. 2010-2011 saw their reformation for a few reunion shows, but the band has no plans to get back together permanently.

Members have gone on to join bands such as Echo Crush and Motorist.