Blink-182, like so many veteran groups, has gone back to its indie roots. The pop-punk band, which performs 9 p.m. Saturday, Sept. 7, at Revel Casino Hotel in Atlantic City, operates on its own timetable, having parted ways with its label in 2011.

The band is doing a brief U.S. tour this month, including a Sept. 10 benefit for Hurricane Sandy relief at the newly reopened Starland Ballroom in Sayreville, before prepping for a return to the studio early next year.

“Being independent, we have the freedom and ability to record and release new music when and how we want,” according to Mark Hoppus, the trio’s bassist-vocalist.

The band’s current live show is likely to focus on its catalog, judging by a series of performances earlier this year in Australia, blink-182’s first appearance Down Under in a decade.

“Guitarist Tom Delonge and Hoppus — minus drummer Travis Barker, who is afraid to fly — managed to turn back the clock, belying their approach to middle age and that of many of their fans, according to Adam Lewis of FasterLouder.com.

“It’s hard to think of a pop-punk band with the sustained appeal of blink-182, who still managed to quickly sell out a huge room over a decade after their most significant albums,” he writes of a late-February show in Sydney.

Blink, over the past 15 years, has released six studio albums, selling more than 30 million records. The band’s biggest hit album was 1999’s “Enema of the State,” which sold about 4 million copies and spawned the hits “What’s My Age Again,” “All the Small Things” and “Adam’s Song.”

In 2004, the band went on hiatus, before reuniting in 2008. “Neighborhoods,” blink’s 2011 release, made the Top 10 in the U.S., U.K., Germany and five other countries, and yielded the hit singles “Up All Night” and “After Midnight.” In December, the band offered a teaser of some new music, via a five-song EP, “dogs eating dogs.”

Having come this far (mostly) together, blink-182 knows how and when to light its creative spark.

“It always happens when the three of us are together in a room,” Hoppus tells rock magazine Kerang! “Because when (we’re not touring), Tom lives in San Diego, Travis lives in Los Angeles and I live in London, so we don’t really talk all that much. But then when we get in a room together, it all falls into place and we start making jokes. That’s when we start writing songs and reconnecting with everything.