2600

2600 may refer to:


 * 2600 hertz, the audio tone used in phreaking to gain control of telephone networks
 * 2600: The Hacker Quarterly, a magazine named after the aforementioned 2,600 Hz tone
 * Atari 2600 video game console
 * ATI's Radeon R600 Radeon HD 2xxx series graphics card
 * ARP 2600 analog synthesizer
 * Alfa Romeo 2600, an executive car
 * Nokia 2600, a mobile phone released in 2004
 * Nokia 2600 classic, a mobile phone released in 2008
 * The last year of the 26th century
 * The number 2600