IP subnet calculator

2a02:4780:2b::-2a02:4780:2d:ffff:ffff:ffff:ffff:ffff

2a02:4780:2b::-2a02:4780:2b:ffff:ffff:ffff:ffff:ffff
2a02:4780:2b::/48

2a02:4780:2c::-2a02:4780:2d:ffff:ffff:ffff:ffff:ffff
2a02:4780:2c::/47