IPv6 standard notation already uses alpha characters. Some notations of IPv4 use them too. "Just adding characters" isn't a solution on its own. IPv4 is 32-bit

IPv6 standard notation already uses alpha characters. Some notations of IPv4 use them too. "Just adding characters" isn't a solution on its own. IPv4 is 32-bit addresses, IPv6 is 128-bit addresses. That's all there is to that.