They are points for sure, but what breed is more difficult to say. If any. Most probably they are domestic shorthair, seal point with white.
The only hint they may be of some recognized breed is momma and kittens is all of the same pattern and overall looks. Which do hints some consistency...
The color pattern as such is sometimes referrred as snowshoe, but its a rare breed, nowadays more or less non existing any more. Also, the snowshoes have somewhat more protruding muzzles, as they were constructed with siameses as base.
ps. These two kittens near momma seems to not have white spots on them.