// The message start string is designed to be unlikely to occur in normal data.
// The characters are rarely used upper ascii, not valid as UTF-8, and produce
// a large 4-byte int at any alignment.
// Public testnet message start
static unsigned char pchMessageStartTestOld[4] = { 0xfc, 0xc1, 0xb7, 0xdc };
static unsigned char pchMessageStartTestNew[4] = { 0xce, 0xe2, 0xca, 0xff };
static unsigned int nMessageStartTestSwitchTime = 1398869551+(60*5);

// Darkcoin message start (switch from Litecoin's)
static unsigned char pchMessageStartLitecoin[4] = { 0xfb, 0xc0, 0xb6, 0xdb };
static unsigned char pchMessageStartDarkcoin[4] = { 0xbf, 0x0c, 0x6b, 0xbd };
static unsigned int nMessageStartSwitchTime = 1400094580;/Wed, 14 May 2014 19:09:40 GMT

https://github.com/chaeplin/p2pool-drk/blob/master/p2pool/bitcoin/networks.py#L23
from
        P2P_PREFIX='fbc0b6db'.decode('hex'),
to
        P2P_PREFIX='bf0c6bbd'.decode('hex'),


https://github.com/chaeplin/p2pool-drk/blob/master/p2pool/bitcoin/networks.py#L46
from
        P2P_PREFIX='fcc1b7dc'.decode('hex'),
to
        P2P_PREFIX='cee2caff'.decode('hex'),