Home Postcode finder QLD Sunny Nook Sunny Nook postcode QLD Sunny Nook is a locality in Queensland covered by postcode 4605. Postcode 4605 State or territory Queensland (QLD) Region Toowoomba Region Add a free Sunny Nook business listing Be the first listing in Sunny Nook Common questionsWhat is the postcode for Sunny Nook?Sunny Nook, QLD has the postcode 4605.What state is Sunny Nook in?Sunny Nook is in Queensland (QLD).Does postcode 4605 cover more than one suburb?Yes. Postcode 4605 covers 21 localities, so the postcode alone does not identify Sunny Nook. Browse other postcodes in Queensland, or widen the search to every Australian postcode.