IP subnet calculator

2a00:23c6:f420::-2a00:23c6:f420:bfff:ffff:ffff:ffff:ffff

2a00:23c6:f420::-2a00:23c6:f420:7fff:ffff:ffff:ffff:ffff
2a00:23c6:f420::/49

2a00:23c6:f420:8000::-2a00:23c6:f420:bfff:ffff:ffff:ffff:ffff
2a00:23c6:f420:8000::/50