50428 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":43.137729,"wof:name":"50428","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102086619,"locality_id":85943505,"postalcode_id":554725857,"region_id":85688713}],"mz:is_deprecated":0,"lbl:latitude":43.136933,"geom:area":0.035003,"geom:longitude":-93.389882,"wof:id":554725857,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611183262,"wof:belongsto":[102191575,85633793,102086619,85943505,85688713],"wof:concordances":{"gp:id":"12779947"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588288","geom:area_square_m":3.15836425774979E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-93.497668,43.009291,-93.280403,43.255591","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-93.397107,"wof:geomhash":"3177ebc9072e7f32e4aeaf1cc3578fe0","wof:parent_id":85943505,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Clear Lake"}