This is incorrect information as it is incomplete.
Some Russian artillery ranges out to 37 miles. Some of their artillery has a 13 mile range. There are several types in between, with about a 22 mile range.
The extended range of the M777 towed howitzer is 22 miles. With the Excaliber rounds, they have accuracy to about 4 meters.
Artillery has traditionally been a Russian strength.
The range of artillery depends a lot on the ammunition.
Its normal to quote the maximum possible range with things like rocket assisted projectiles, but it opens the question of the availability of this more complex ammo. This stuff is mainly intended for counterbattery work.