BIP-0016 p2sh keys and altcoins It appears that bitcoin addresses using p2sh keys have a different prefix to that of normal bitcoin addresses. Do other altcoins such as litecoin, peercoin, dogecoin etc include this functionality?
Upon looking at the source of a number of altcoins I have found that p2sh keys are built into all the ones I checked.

For P2SH, the first address byte will be:


  bitcoin: '05'
  litecoin: '05'
  peercoin: '75'
  dogecoin: '16'
  beavercoin: '05'
  freicoin: '05'
  protoshares: '05'
  megacoin: '05'
  primecoin: '53'
  auroracoin: '05'  


The tricky bit about this is that you can't nessesarily tell what network a P2SH address belongs to like you can with normal addresses.

The reason I wanted to know is so I could collate the version numbers for my project:

http://github.com/ryanralph/altcoin-address