mullaway postcode nswst Home ›› Postcode Finder ›› NSWST ›› Mullaway Mullaway local listingsThe suburb of Mullaway is located in NSW and has a postcode of 2456. Free mullaway business listing! 1Mullaway Public SchoolOld Pacific Hwy 02 66540377 View more business listings in mullaway Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.