5400 is a postalcode and its consensus geometry is derived from atgov.
{"mz:is_ceased":0,"geom:latitude":47.683758,"wof:name":"5400","counts:names_total":0,"wof:placetype":"postalcode","atgov:gkz":[50205],"wof:hierarchy":[{"continent_id":102191581,"country_id":85632785,"county_id":102049773,"localadmin_id":1108837091,"postalcode_id":504800735,"region_id":85681681}],"mz:is_deprecated":0,"lbl:latitude":47.673751,"atgov:gem_name":["Hallein"],"geom:area":0.003236,"geom:longitude":13.090876,"wof:id":504800735,"atgov:bez_name":["Hallein"],"counts:concordances_total":1,"geom:type":"MultiPolygon","wof:lastmodified":1496614640,"wof:belongsto":[85681681,102191581,1108837091,85632785,102049773],"wof:concordances":{"gp:id":"12816264"},"wof:repo":"whosonfirst-data-postalcode-at","atgov:bez_nr":[502],"src:geom":"atgov","wof:country":"AT","counts:names_preferred":0,"geom:area_square_m":2.6939564505778E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"AT","counts:names_languages":0,"geom:bbox":"13.0430499576,47.6334673652,13.1295577816,47.73215588","src:lbl:centroid":"mapshaper","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":13.097431,"wof:geomhash":"6bcd7a951b333edd2e548b66a3ddf47b","wof:parent_id":1108837091,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu"}