Home Postcodes by state VIC 3912 Postcode 3912 3912 is the postcode for 2 localities in VIC: Pearcedale and Somerville. Localities with postcode 3912PearcedaleVICSomervilleVIC Postcode 3912 State or territory Victoria (VIC) Localities 2 Council area Casey; Mornington Peninsula Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3911 · Postcode 3913