My newborn sleeps continuously up to 4 hrs with out any feed, should I wake him up in between for feeds?

Baby need to feed every 2-3hrs till 1month old. So wake the baby and feed if age less than a month. After that you should let the baby sleep longer without waking up atleast in night time. Its their way of adjusting to circadian clock. By 3rd month baby would even sleep up to 6hrs straight in night which is totally fine. They would feed more often in morning to compensate that.