Using a notational code having three levels of inclusiveness (attributes, attribute themes, and motifs), four stylistically distinct ceramic wares of evident chronological significance can be delineated in the Aitape area: Nyapin, Sumalo, Aiser, and Wain. The robustness of this stylistic sequence can be confirmed using two alternative computer-based algorithms: the software package Network 4.5.0.2 developed by Fluxus Technology, Ltd, for estimating all possible shortest and least complex phylogenetic trees in a dataset and the network software packages Ucinet 6.207 and NetDraw 2.083. Based on these analyses, it is reasonable to infer that people in this area of the Sepik coast have been using locally made pottery for at least 1,500–2,000 years belonging to a single, distinct, and stylistically evolving local ceramic tradition.