38590 is a postalcode and its consensus geometry is derived from frgov.
{"mz:is_ceased":0,"geom:latitude":45.326815,"wof:name":"38590","counts:names_total":0,"wof:placetype":"postalcode","frgov:DEP":"38","frgov:ID":"38590","frgov:_COL6":3054.6087,"mz:is_approximate":1,"wof:hierarchy":[{"continent_id":102191581,"country_id":85633147,"county_id":102069083,"empire_id":136253037,"localadmin_id":404403845,"macrocounty_id":404227669,"macroregion_id":1108826389,"postalcode_id":421301567,"region_id":85683427}],"mz:is_deprecated":0,"frgov:SURF":73.68494,"geom:area":0.008477,"geom:longitude":5.363801,"wof:id":421301567,"frgov:LIB":"Saint-tienne-de-Saint-Geoirs","counts:concordances_total":1,"geom:type":"MultiPolygon","wof:lastmodified":1496506759,"wof:belongsto":[85683427,102191581,85633147,404403845,404227669,1108826389,136253037,102069083],"wof:concordances":{"gp:id":"12724780"},"wof:repo":"whosonfirst-data-postalcode-fr","src:geom":"frgov","wof:country":"FR","counts:names_preferred":0,"frgov:POP2010":7999,"gp:parent_id":"12597188","geom:area_square_m":7.3691398403598E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"FR","counts:names_languages":0,"geom:bbox":"5.28473377116,45.2779449623,5.44059624874,45.3716345413","wof:superseded_by":[],"wof:supersedes":[],"wof:geomhash":"c2faee8603f4bf254a19de8abec05489","wof:parent_id":404403845,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu"}