No Doubt are planning a world tour following reunion dates last year.
The band played shows in North America when they reunited, but Tony Kanal has indicated they now plan to tour further.
"I think it'll [a tour] be even bigger and when I say bigger I mean more shows and around the world," the bassist said of potential dates, adding that the band are currently writing a sixth studio album.
"I swear, we're having more fun than we've ever had writing a record before," Kanal told Billboard.com.
He added: "I think [because] it's been a while, but also because we're older. The fact that we're still doing it together after 24 years - you know, working on music - I think we really appreciate that."
The group's last studio album was 2001's 'Rock Steady'.
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