This range can vary depending on the type of mandolin and the tuning used. For example, some mandolins may be tuned in fifths (like a violin), which would extend the range up to A6. Alternatively, some mandolins may be tuned in fourths, which would lower the range down to F#3.
The most common tuning for a mandolin is GDAE (low to high), which is the same as the tuning of the four highest strings of a violin. This tuning allows for a wide variety of musical styles, from classical to bluegrass.