50240 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":41.295044,"wof:name":"50240","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102086617,"postalcode_id":554725749,"region_id":85688713}],"mz:is_deprecated":0,"lbl:latitude":41.29709,"mz:postal_locality_alt":["Saint Charles","St Marys"],"geom:area":0.021254,"geom:longitude":-93.794787,"wof:id":554725749,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611183268,"wof:belongsto":[102191575,85633793,102086617,85688713],"wof:concordances":{"gp:id":"12779850"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"2347574","geom:area_square_m":1.974589961427E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-93.922014,41.235185,-93.673414,41.37091","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-93.792788,"wof:geomhash":"ce1e3f0cbf212682dc5ecf4f3d78d8be","wof:parent_id":102086617,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"St Charles"}