We use 60 (0x3C) as the prefix for public key base 58 representations. Still 0x80 for private keys.
For future reference, where did you get these hex from?
It's in the source code in the file base58.h (it's written as 60 in decimal).
I decided to put that value so addresses start with R, got it from here:
https://en.bitcoin.it/wiki/List_of_address_prefixesAhh. I see. Thanks!