holsworthy postcode nswbu Home ›› Postcode Finder ›› NSWBU ›› Holsworthy Holsworthy local listingsThe suburb of Holsworthy is located in NSW and has a postcode of 2173. Free holsworthy business listing! 1Holsworthy Public SchoolInfantry Pde 02 982514792Holsworthy Childcare Centre105 Derna Road 3Holsworthy High SchoolHuon Crescent 02 98252888 View more business listings in holsworthy Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.