castlereagh postcode nswbu Home ›› Postcode Finder ›› NSWBU ›› Castlereagh Castlereagh local listingsThe suburb of Castlereagh is located in NSW and has a postcode of 2749. Free castlereagh business listing! 1Black N White Catering119 Devlin Road 04 0702 95512The Lakes Christian College206 East Wilchard Rd 02 477740573Castlereagh Public School87-101 Post Office Rd 02 47761197 View more business listings in castlereagh Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.