There are three versions of WiFi, each using their own spectrum ranges
Standard WiFi 2.4GHz with three channels each with speeds up to 600Mbps
WiFi 5.8GHz eight indoor channels with speeds upto 1300Mbps
5GHz offers faster throughput, but 2.4GHz has greater range and is less impacted by obstructions like walls.
5725MHz to 5875MHz
Wi-Gig has 8 main bands(Max 40) between 57.24GHz and 74.52GHz, Supporting up to 7 Gbps data rate range of up to 60 metres, with a directional range of up to several Km in ideal weather and conditions.
For details see IEEE 802.11ay standard.