IP subnet calculator

2408:8256:30a0::-2408:8256:315f:ffff:ffff:ffff:ffff:ffff

2408:8256:30a0::-2408:8256:30bf:ffff:ffff:ffff:ffff:ffff
2408:8256:30a0::/43

2408:8256:30c0::-2408:8256:30ff:ffff:ffff:ffff:ffff:ffff
2408:8256:30c0::/42

2408:8256:3100::-2408:8256:313f:ffff:ffff:ffff:ffff:ffff
2408:8256:3100::/42

2408:8256:3140::-2408:8256:315f:ffff:ffff:ffff:ffff:ffff
2408:8256:3140::/43