This paper gives an account of the use of nominal address forms, in a sample of written digital discourse, of speakers from Iquique (Chile). Specifically, a classification of nominal address forms is presented in a stratified sample of 5.029 INTERACTIONS published in the FACEBOOK Timeline of 90 subjects from Iquique, for a period of 30 days. The results show a high use of nominal address forms in this type of interactions and differences according to sex and age group of the speakers.