Conversation so far:
what radio show was Steven Van Zandt host of ?
Underground Garage is a syndicated show by Bruce Springsteen & The E Street Band guitarist Steven Van Zandt to present rock 'n' roll and garage rock on radio
when did Steven Van Zandt start hosting Underground Garage?
Since 2002, Steven Van Zandt has hosted Little Steven's Underground Garage
was the show Underground Garage popular?
Underground Garage is heard by approximately one million listeners in the US each week

Question: what international markets are these?
Self-contained rewrite: what international markets are Underground Garage listened?