184.108.40.206, 220.127.116.11, 18.104.22.168, 22.214.171.124, 126.96.36.199, 188.8.131.52, 184.108.40.206
Windows 10: Yes
Xbox One: Yes
Mobs of all types are able to spawn on redstone components. Redstone being spawn proof was specifically added to java around 1.9, A lot of people use redstone dust to mob proof builds. it's a simple way of preventing accidents while not torch/slab spamming everything.
Please note that mobs will spawn on top of ALL redstone components.
Pistons of both types.