I just noticed that every address starts with a capital letter or with a number (after its prefix) and I want to understand why. I'll take a p2pkh address as an example. We add a version byte in front of the RIPEMD-160 hash and it becomes:

Then we add a checksum from a SHA-256 hash and it will be:

These two zeroes in the front define "1" when we convert the above to base58. Why every address starts with a capital/number since we encode a hash?