3390 is a postalcode and its consensus geometry is derived from ausstat.
{"mz:is_ceased":0,"geom:latitude":-36.64697,"wof:name":"3390","counts:names_total":0,"wof:placetype":"postalcode","mz:is_approximate":1,"wof:hierarchy":[{"continent_id":102191583,"country_id":85632793,"county_id":102048571,"localadmin_id":404539647,"postalcode_id":504779519,"region_id":85681497}],"mz:is_deprecated":0,"ausstat:POA_CODE":"3390","geom:area":0.047969,"geom:longitude":142.49311,"wof:id":504779519,"ausstat:POA_NAME":"3390","counts:concordances_total":1,"geom:type":"MultiPolygon","wof:lastmodified":1480933325,"ausstat:SQKM":476.008712,"wof:belongsto":[85681497,102191583,404539647,85632793,102048571],"wof:concordances":{"gp:id":"12707651"},"wof:repo":"whosonfirst-data-postalcode-au","src:geom":"ausstat","wof:country":"AU","counts:names_preferred":0,"gp:parent_id":"2344705","geom:area_square_m":4.7589638399411E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"AU","counts:names_languages":0,"geom:bbox":"142.369845792,-36.804635013,142.631395552,-36.4880981445","wof:superseded_by":[],"wof:supersedes":[],"wof:geomhash":"472d5df0be72b451c7a5078858db4c6e","wof:parent_id":404539647,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu"}