IP subnet calculator

2a02:4780:11::-2a02:4780:12:ffff:ffff:ffff:ffff:ffff

2a02:4780:11::-2a02:4780:11:ffff:ffff:ffff:ffff:ffff
2a02:4780:11::/48

2a02:4780:12::-2a02:4780:12:ffff:ffff:ffff:ffff:ffff
2a02:4780:12::/48