A small correction to my previous post...
(Tnx Thomas, DL9SAU for pointing it out).
The subnets are /26 not /22.
In the classic routing schemes that means that by
subnetting e.g. a /24
subnet into 4 /22 subnets you loose theoretically 2 subnets, and can use
only x.x.x.64/22 and x.x.x./128/22.
Marius