muswellbrook postcode nswst Home ›› Postcode Finder ›› NSWST ›› Muswellbrook Muswellbrook local listingsThe suburb of Muswellbrook is located in NSW and has a postcode of 2333. Free muswellbrook business listing! 1BlackRoo Industries12 Enterprise Cres, Muswellbrook NSW, Australia (02) 6543 00332George & Matilda Eyecare2/51 Bridge St, Muswellbrook NSW 2333, Australia (02) 6543 31433Muswellbrook South Public School57-61 Maitland St 02 65431896 View more business listings in muswellbrook Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.