Could Wikipedia show hashed IP addresses instead?

When an unregistered Wikipedia user makes a contribution, it shows the IP address from which the edit was made instead of a username. In the interest of privacy, could Wikipedia instead display a hash of the IP address? They could still keep track of an IP address's contributions, and ban them when necessary. IP range blocks could still be issued server-side.

The IP addresses of registered users are hidden anyways (accessible only by a few certain users, and only if warranted[1]), so could Wikipedia offer this to all users?

[1] https://en.wikipedia.org/wiki/WP:CheckUser