38700 is a postalcode and its consensus geometry is derived from frgov.
{"mz:is_ceased":0,"geom:latitude":45.253165,"wof:name":"38700","counts:names_total":0,"wof:placetype":"postalcode","frgov:DEP":"38","frgov:ID":"38700","frgov:_COL6":4716.274,"mz:is_approximate":1,"wof:hierarchy":[{"continent_id":102191581,"country_id":85633147,"county_id":102071553,"empire_id":136253037,"localadmin_id":404404671,"macrocounty_id":404227669,"macroregion_id":1108826389,"postalcode_id":421301591,"region_id":85683427}],"mz:is_deprecated":0,"frgov:SURF":34.807307,"geom:area":0.003999,"geom:longitude":5.766821,"wof:id":421301591,"frgov:LIB":"La Tronche","counts:concordances_total":1,"geom:type":"MultiPolygon","wof:lastmodified":1496506758,"wof:belongsto":[85683427,102191581,85633147,404404671,404227669,1108826389,136253037,102071553],"wof:concordances":{"gp:id":"12724791"},"wof:repo":"whosonfirst-data-postalcode-fr","src:geom":"frgov","wof:country":"FR","counts:names_preferred":0,"frgov:POP2010":11352,"gp:parent_id":"12597188","geom:area_square_m":3.4809837345915E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"FR","counts:names_languages":0,"geom:bbox":"5.72582585537,45.1889536126,5.81500417458,45.2988779408","wof:superseded_by":[],"wof:supersedes":[],"wof:geomhash":"fbd678836e31cafb33878492163856bf","wof:parent_id":404404671,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu"}