biddeston postcode qldga Home ›› Postcode Finder ›› QLDGA ›› Biddeston Biddeston local listingsThe suburb of Biddeston is located in QLD and has a postcode of 4401. Free biddeston business listing! 1Biddeston State SchoolLot 203 Toowoomba/Cecil Plains Rd 07 46916145 View more business listings in biddeston Search and find other Postcodes in Queensland or widen the search to Postcodes in Australia.