byfield postcode qldga Home ›› Postcode Finder ›› QLDGA ›› Byfield Byfield local listingsThe suburb of Byfield is located in QLD and has a postcode of 4703. Free byfield business listing! 1Byfield State School2233 Byfield Rd 07 49351140 View more business listings in byfield Search and find other Postcodes in Queensland or widen the search to Postcodes in Australia.