Led Zeppelin were never a singles band in the UK during their hey day. But they did drop their standards elsewhere in the world, particularly in the USA. In fact the B Side to the 7″ single release of “Immigrant Song” featured the bands only non-album release when it hit the shops in 1970. It was called “Hey Hey What Can I Do”, and it has seen the light of day on a number of reissues, notably the expanded ‘Coda’.
The band did eventually reach the UK singles chart in 1997 with a reissue of “Whole Lotta Love”. In total, worldwide Zep released 15 singles, the majority of which charted somewhere in the world. The original single release of “Whole Lotta Love” in 1969 made it to number one in both the Australian and German charts. “Immigrant Song” was a top ten hit in Canada, Germany, Netherlands, Switzerland and on the US Cash Box charts.