7½ months old baby can't sleep well through the night

Mummys I'm really exhausted as my baby has been waking up literally and exactly every hour through the night. It's really tiring to keep picking him up and latch..and after feeding he goes back to sleep and this happens every hour😟 He usually sleeps at around 930 ish. I have tried changing his sleeping areas..like moving his cot to the hall and different rooms etc. But still 😞 Any idea what could be his issues?