Strangely, Dispensationalism is a 19thC English creation of a certain John Neslon Darby, founder of an exclusivist sect k/a Plymouth Brethren, aka Exclusive Brethren. Yep, 'exclusive' is even in their name, so in that sense they share something in common with almost all cults, but their theology was largely evangelical in nature despite that. At least until their leadership transferred to the US. The Brethren is now more or less a full-blown cult like any other, and JND would be turning in his grave if he could see how his 'baby' turned out.
But ironically, Dispensationalism made very little impact in its country of origin, even though you will find some adherents scattered here and there. The so-called 'Prophetic Witness Movement' is one such group that is largely Dispensational in outlook. How Dispensationalism became the dominant prophetic school in the US is one of the more bizarre stories in the history of the Church, and it is recounted in an excellent treatise by Joseph M Canfield: