@creativegamingname @futurebird Best reference for questions like this is _The_Ants_ ( Brent Holldobler, E. O. Wilson, Harvard University Press, 1990 ). Ant *nests* communicate with each other -- fire ant nests establish mutual boundaries at least.
Ant workers communicate through chemical signals, either aerosol or through contact. I believe their communications with other ants are limited to IFF and prey/slave raiding.