The remains of Xindus in 2153
Xindus, the Xindi homeworld, was a planet in the Delphic Expanse that was destroyed by Xindi-Insectoid and Xindi-Reptilian weapons in the course of a century-long war between the six native Xindi species. The planet was geologically unstable and was destroyed when the Reptilian and Insectoid weapons detonated beneath the eight largest seismic fissures of the planet. While five of the species escaped this destruction, the Xindi-Avians were wiped out. The five species spread out across the Expanse, settling on various planets. (ENT: "The Shipment")
The remains of Xindus were found in 2153 by the Enterprise (NX-01). At that time, the debris was about 120 years old, indicating that Xindus was destroyed in the 2030s. (ENT: "The Xindi")
The Xindi were informed by the Guardians that Humans from the 26th century were going to destroy their new homeworld in the future, leading them to the decision to attack Earth. (ENT: "The Council")