[1] The group consisted of Richard Camacho, Erick Brian Colón, Christopher Vélez and Zabdiel De Jesús; Joel Pimentel was a member until his departure in May 2021.

They won a five-year recording contract with Sony Music Latin after becoming the winning competitors of the first season of La Banda.

[4][5][6][7] The group released their self-titled second studio album on April 6, 2018, which included the singles "Hey DJ", "Mamita" and "Se Vuelve Loca".

[8] Their debut EP Que Quiénes Somos, containing the singles "De Cero" and "Pegao" (featuring Manuel Turizo), was released on October 11, 2019.

Erick Brian Colón, Christopher Vélez, Zabdiel De Jesús, Richard Camacho and Joel Pimentel auditioned for the first season of La Banda, a televised singing competition which started on Univision in September 2015, created by Simon Cowell and produced by Ricky Martin.

The band's members competed individually with other contestants from Latin America and the United States before the show's judges, Martin, Alejandro Sanz and Laura Pausini.

The band was formed on the finale of the show, on December 13, 2015, when they received their name, which alludes to the Spanish word for five, "cinco", and is pronounced in English as it is spelled: "C-N-C-O".

[11] They won a recording contract of 5 years with Sony Music Latin,[3] and rapper Wisin was scheduled to produce their first album.

[24] On May 13, they released their second single, "Quisiera",[25] which peaked on Billboard's Hot Latin Songs at number 29,[3] with its music video premiering on June 3.

[31][33] On its release date, the band met fans while traveling with Ricky Martin on his tour, and they gave a concert at the Miami International Mall to celebrate the album's debut.

[23][31][34] In November, they filmed a new music video for one of the songs on Primera Cita, "Para Enamorarte", at the Los Angeles Ramon C. Cortines School of Visual and Performing Arts.

A video clip was scheduled for airing on La Banda's season finale on December 11, then on Toyota's Latino Facebook page and on YouTube.

[37] On February 26 they began their first headlining tour, Más Allá, in Cochabamba, Bolivia, for a total of 15 countries, including 40 performances in Central and South America, Mexico, Portugal, Spain, and the United States.

[42] On August 18, CNCO released a remixed version of "Reggaetón Lento" featuring vocals from British girl group Little Mix as the second single from the record.

[50] The music video for the fifth single "Se Vuelve Loca" was made available on July 19, with a Spanglish version being released for digital download and streaming several hours later.

[53] On November 8, the group released a remix version of "Hey DJ", with American singer-songwriter Meghan Trainor and Jamaican artist Sean Paul.

It contains a sample of a song by Cuban salsa singer Celia Cruz and features Latin Trap in its production.

[59] The band was announced as part of the line-up for 2019 MTV Video Music Awards pre-show where they performed "De Cero" on August 26.

On November 7, the group was featured on the song "Como Así" by Argentinian singer Lali Espósito, which appears on her album, Libra.

[69] The boys released a song titled "Beso" on August 28 and performed it at the VMAs a week later, this time at the main show.

They released their version of Puerto Rican artist Big Boy's song "Mis Ojos Lloran Por Ti" the following week, with its video being inspired by NSYNC's "Tearin' Up My Heart".

On February 5, the group released their new album, Déjà Vu, to digital download and streaming, along with the tracks' audios on their YouTube channel.

[79] On January 13, 2022, the band released "Party, Humo & Alcohol", their second song as a foursome, which has garnered more than ten million views on YouTube.

On February 3, it was announced that the group would make their acting debut on an upcoming musical miniseries on Disney+ titled 4 Ever, which was originally set to release in the fall of the same year, but eventually came out on October 11, 2023.

On May 13, they appeared on "Teteo" with Maffio and Kiko el Crazy and featured on "Suelta, Sola y Tranquila (Remix)" with Fabro and Mya, which came out on June 17.

Later that month, they performed the song at Premios Juventud, with the last-minute absence of Kenia Os due to her testing positive to COVID-19.

Their first song of 2023 was "Diferente" with music producer and DJ Steve Aoki, released on February 3 as a single from his album HiROQUEST: Double Helix.

On July 20, Venezuelan duo Mau y Ricky released their album Desgenerados Mixtape, which contained the track "Vivir Sin Ti", with CNCO, a highly-anticipated collaboration.