253,000 (2010 J. Leclerc), increasing. Total users in all countries: 289,180 (as L1: 285,800; as L2: 3,380).
Debub, Debubawi K’eyih Bahri, and Semenawi K’eyih Bahri regions.
Irob dialect only in Ethiopia. Very similar to Afar [aar].
Ethnic group names are Asa’orta, Hadu (Hazu), Miniferi. Nomadic. Not accepting of outsiders. Muslim, Christian.