Rana, Led Zeppelin's only single release (UK) other than a number of promos was "Whole Lotta Love/ Livin' Lovin' Maid Atlantic 584 309." It was however quickly withdrawn, at the bands insistance, when it began (shock/horror) to become a hit (it was however the theme music for Top of the Pops for many years). The bands only chart success came in their earlier incarnation as the Yardbirds (Page was left holding the baby when they disintegrated, and the New Yardbirds became Led Zep). It did not stop various members from releasing singles before and after their time in the band.
(Jimmy Page was probably the guitarist on a good many UK one hit wonders by the way)
love, john.