For each algorithm, there are two stratum servers available. You can find the stratum address by navigating to our algorithms list. Under each algorithm name, there is a stratum address you can use for mining. You can pick between SSL and TCP stratum addresses.
Note that recently we changed stratum addresses to auto locations. You can read more about it here.
We will automatically allocate miners to the closest stratum available. Each miner gets connected to the stratum that has the lowest ping.
Tip: Make sure to use the SHA256AsicBoost stratum if you are using a SHA256 ASIC.