Home Postcodes by state SA 5552 Postcode 5552 5552 is the postcode for 4 localities in SA: Kainton, Paskeville, Sunnyvale and Thrington. Localities with postcode 5552KaintonSAPaskevilleSASunnyvaleSAThringtonSA Postcode 5552 State or territory South Australia (SA) Localities 4 Council area Yorke Peninsula; Mainly Copper Coast, partly Barunga West; Copper Coast Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5550 · Postcode 5554