old-guildford postcode nswst Home ›› Postcode Finder ›› NSWST ›› Old-Guildford Old Guildford local listingsThe suburb of Old Guildford is located in NSW and has a postcode of 2161. Free old guildford business listing! Get the first free listing in old guildford! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.