[vincnetas]

It kinda is oblast : https://en.wikipedia.org/wiki/Kaliningrad_Oblast

[gdy]

Yes, but oblast has the smallest amount of autonomy. It's like a county in the GB or the US.

[thriftwy]

Traditionally, raion is a county-level subdivision, though these are now superceded by settlements (communes).

Oblast' is a top-level federation subject, comprised of these. Its's true that they are usually smaller and less authonomous than U. S. states.