A deacon (now an archimandrite) who was attached to the Metropolitan of Boston once mentioned to me, when I asked the question, "Only the bishop should address their deacons as, 'Deacon N.' For everyone else, it's 'Father Deacon N.' or 'Father N.'" This practice is reinforced in the current practice of our Metropolis (our chancellor is an Archdeacon), and in a few references in Greek (I wasn't seeking the information when I saw it, so I didn't bother remembering where it came from).
In the one Greek book, it stated that the proper full address for all three "higher" orders was (once upon a time) Father [Rank] N. - Father Deacon, Father Presbyter, Father Bishop/Metropolitan. I haven't seen this in any other sources.
Of course, in current Greek practice there are actual formal salutations for each "rank" of clergy that is dependent on other factors (such as education). My salutation, as a theologically-educated married presbyter, is "Aidesimologiotate," (vocative) which is the combination of αἰδέσιμος + λογιώτατος. A bit of a mouthful.
So, for example, in Greek one could use "Father" for all deacons, although it would be more proper to address a Deacon who has a formal theological degree (bachelor's and above) to be addressed as "Ierologiotate" (Vocative).