In September 2015, the label announced that the lineup of iKon is officially confirmed. The artists didn’t lose any time and immediately recorded their debut LP, Welcome Back. It was re-released in an extended version in December. The original album topped the national South Korean Chart, came in 22nd on Japan Oricon Albums Chart, conquered Taiwan G-Music Weekly J-POP Charts, and reached the 3rd spot of Billboard’s World Albums Chart.
The LP featured such popular songs as "My Type" (topped South Korea Gaon Digital Chart), "Airplane" (13th spot), "Rhythm Ta" (8th position), "Apology" (topped the chart), "Dumb & Dumber" (12th spot), "What's Wrong?" (17th position), "Anthem" (6th place). It was an impressive success for the group.
The year 2016 was busy for the band. The artists recorded their first compilation album, iKon Single Collection, and the first live album, 2016 iKon – iKoncert Showtime Tour in Seoul Live CD. The same year, the group presented a single "#WYD", which topped the national South Korean chart. A little later, the artists demonstrated their acting skills by appearing in Heroes of Remix on JSTV.
In 2016 and 2017, the group had a tough concert schedule. It went on three tours, iKoncert: Showtime Tour, Japan Tour, and Japan Dome Tour. At that time, many organizers tried to book iKon for private events.
In 2017, the band participated in the project of the entertainment channel JTBC called iKon Idol School Trip. The same year, the musicians released two popular tracks, "Bling Bling" and "B-Day". The former reached the 24th spot on South Korea Gaon Digital Chart. The latter came in 36th.
In January 2018, the artists recorded a new LP, Return. The album earned high scores from the critics and settled on the 2nd spot of South Korea Gaon Album Chart. It also became popular in Japan, Taiwan, and the USA. The album was the group’s first work to appear in a French chart. It sold 104,000 copies in South Korea, 82,000 in Japan, and a thousand in the USA.
The same year, the band released two EPs, New Kids: Continue in August and New Kids: The Final in October. The albums climbed the 2nd and 1st spot of South Korea Gaon Album Chart accordingly. They also appeared on high spots on the Japanese and Taiwanese charts. The EPs made it into the top-5 of Billboard’s World Albums Chart
In 2018, the artists went on two tours, Japan Tour and Continue Tour. They also participated in numerous TV projects including, iKon TV on YouTube & JTBC, YG Future Strategy Office, iKon Heart Racing Youth Trip on Olleh TV, and A Battle of One Voice: 300 on tvN.
In 2019, iKon is planning to present its third LP, iKON: New Kids. The release is planned for 27 February.