56374 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":45.607109,"wof:name":"56374","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102087719,"localadmin_id":404510527,"postalcode_id":554730311,"region_id":85688727}],"mz:is_deprecated":0,"lbl:latitude":45.670028,"mz:postal_locality_alt":["St Joseph"],"geom:area":0.020846,"geom:longitude":-94.335812,"wof:id":554730311,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611182756,"wof:belongsto":[102191575,85633793,102087719,404510527,85688727],"wof:concordances":{"gp:id":"12782456"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588869","geom:area_square_m":1.80329743558276E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-94.461495,45.514984,-94.24613,45.71748","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-94.303347,"wof:geomhash":"4b551238376d8b71020f8bfab6d75e0f","wof:parent_id":404510527,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Saint Joseph"}