Comment by Dagger2

These are all the same address too: 1.2.3.4, 16909060, 0x1020304, 0100401404, 1.131844, 1.0x20304, 1.0401404, 1.2.772, 1.2.0x304, 1.2.01404, 1.2.3.0x4, 1.2.0x3.4, 1.2.0x3.0x4, 1.0x2.772, 1.0x2.0x304, 1.0x2.01404, 1.0x2.3.4, 1.0x2.3.0x4, 1.0x2.0x3.4, 1.0x2.0x3.0x4, 0x1.131844, 0x1.0x20304, 0x1.0401404, 0x1.2.772, 0x1.2.0x304, 0x1.2.01404, 0x1.2.3.4, 0x1.2.3.0x4, 0x1.2.0x3.4, 0x1.2.0x3.0x4, 0x1.0x2.772, 0x1.0x2.0x304, 0x1.0x2.01404, 0x1.0x2.3.4, 0x1.0x2.3.0x4, 0x1.0x2.0x3.4, 0x1.0x2.0x3.0x4

v6 has optional leading zeros and ":: splits the address in two where it appears". v4 has field merging, three different number bases, and it has optional leading zeros too but they turn the field into octal!