Where are they now? If it’s a bald-faced hornet nest, nearly all of them are dead. The nests are abandoned in winter, and all the non-reproductive hornets die. A fertilized queen will overwinter in the ground or in a tree cavity, and begin again in the spring in a new location.
(The males all die in the winter, so she has to get knocked up in the late summer/fall before they croak.)
I am coping with copious amounts of snow, so will return tomorrow.