Day 6, is this egg viable? Has a ring..

[FefesOwner]

Hi, this is my third round for incubating so I'm still a learner. This is day 5 egg. Not sure what it is? I don't see any veins yet.

 

[gullinkambe]

Looks like a blood ring, which means that the embryo started developing, and then died.
It can happen for a number of reasons, some that we can control like wrong temp and turning during incubation, and rough handling before incubation, but sometimes the embryo simply isn't viable.

I usually leave seemingly blood-ringed eggs a few more days just to be sure. Day 5 is still early.