Why do I have long IP address with letters ? How to convert it ?

Hello,

When I try to check IP address of my connection I am getting longer IP address than usual, that also includes letters. How can I convert this format of IP address to standard IP address format, that includes only numbers ?

You are the most probably getting an IP address in version 6 format - IPv6. It contains eight groups of four hexadecimal digits.

For example:
3a1c:57ab:0db8:fe80:8a2e:1319:85a3:0370

Before you used to get an IP address in IPv4 format. For example: 123.456.789.012

IPv6 has a size of 128 bits and because of that, it should replace 32 bit IPv4. It was created to provide more unique IP addresses available than IPv4 format. IPv4 can provide "only" almost 4.3 billion unique IP addresses.