Home Postcode finder ACT Isabella Plains Isabella Plains postcode ACT Isabella Plains is a locality in Australian Capital Territory covered by postcode 2905. Postcode 2905 State or territory Australian Capital Territory (ACT) Region Canberra Add a free Isabella Plains business listing More business listings in Isabella Plains Businesses in Isabella PlainsIsabella Plains Primary School130-140 Ellerston Ave · 02 62057688KSA Tech ConsultingMaharatta Circuit · 04 10348349MacKillop Catholic College90 Ellerston Ave · 02 62090100 Common questionsWhat is the postcode for Isabella Plains?Isabella Plains, ACT has the postcode 2905.What state is Isabella Plains in?Isabella Plains is in Australian Capital Territory (ACT).Does postcode 2905 cover more than one suburb?Yes. Postcode 2905 covers 7 localities, so the postcode alone does not identify Isabella Plains. Browse other postcodes in Australian Capital Territory, or widen the search to every Australian postcode.