It’s been 27 years since the Omaha, Neb., quintet, 311, brought its unique sound of reggae, hip-hop, funk and heavy metal to the ears of fans throughout the world.

“All of the styles mentioned are accurate ingredients. Personally, jazz has been a big influence. With jazz, you don’t let things get too obvious. 311 used to be more hip-hop but we’ve moved into more reggae, always with rock as the largest ingredient,” says Nick Hexum, says 311 front-man and lead guitarist in a phone interview.

On Aug. 29, the band performs at The Great Allentown Fair. The Fairgrounds Grandstand concert, which includes co-headliner, The Offspring, and opening act, Gym Class Heroes, starts at 7 p.m.

311 is expected to perform the hits, “Down,” “All Mixed Up” and “Amber,” and songs from its 2017 album, “Mosaic,” its 12th studio album, which includes artwork of more than 10,000 photographs taken and submitted by fans as a tribute to the “bond between the band members and our fans,” according to Hexum.

Dubbed by Billboard magazine as “one of the biggest cult bands in America, whether you love or hate them,” 311 has its own unofficial holiday celebrated with a concert on March 11 (3-11) every two years.

“We’ve been playing three or four tracks off of ‘Mosaic’ this summer,” Hexum says. Songs like ‘Too Late’ have become classics that our show would feel incomplete without. That one rocks the house.”

In addition to 12 studio albums, 311 has released two live albums, four compilation albums, four EPs and four DVDs. After a series of independent releases, the band was signed to Capricorn Records in 1992 and released “Music” in 1993 and “Grassroots” in 1994.

The band has had its biggest commercial success with its self-titled 1995 album, which reached No. 12 on the Billboard 200 chart and went platinum on the strength of the singles “Down” and “All Mixed Up.”

The band’s next three albums, “Transistor,” 1997, “Soundsystem,” 1999, and “From Chaos,” 2001, were also successful with the first going platinum and the other two going gold. The 2004 compilation album, “Greatest Hits 93’-’03,” was certified gold.

When asked how the band has managed to stay together, Hexum says, “Hard work and loving what we do. We stay grateful for the life we lead thanks to our awesome fan base.

“You have to be ready to concede to the wisdom of the group. Be ready to not get your way. Stay flexible. And there’s a genuine bond there. We’re brothers.

The name, 311, came about from the Omaha Police Department’s police scanner radio code for indecent exposure after the group’s original guitarist went streaking.

“Yep, it’s true. When I heard the idea of naming the band a number, I liked it. Then when P-Nut told me the back story of the idea, I liked it even more,” Hexum says.

Tickets: Allentown Fair box office, 302 N 17th St., Allentown; allentownfairpa.org/; 610-433-7541