58746 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":48.718213,"wof:name":"58746","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102082117,"localadmin_id":404482489,"postalcode_id":554732297,"region_id":85688525}],"mz:is_deprecated":0,"lbl:latitude":48.713443,"mz:postal_locality_alt":["Mohall","Norma"],"geom:area":0.141257,"geom:longitude":-102.085157,"wof:id":554732297,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611184401,"wof:belongsto":[102191575,85633793,102082117,404482489,85688525],"wof:concordances":{"gp:id":"12783469"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"2347593","geom:area_square_m":1.152386134266613E9,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-102.45187,48.546238,-101.842141,48.999015","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-102.094053,"wof:geomhash":"fecd2774137c6c599e41e8f387750c16","wof:parent_id":404482489,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Kenmare"}