56756 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":48.892287,"wof:name":"56756","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102087665,"localadmin_id":404512937,"postalcode_id":554730753,"region_id":85688727}],"mz:is_deprecated":0,"lbl:latitude":48.893305,"geom:area":0.033677,"geom:longitude":-95.547857,"wof:id":554730753,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611182722,"wof:belongsto":[102191575,85633793,102087665,404512937,85688727],"wof:concordances":{"gp:id":"12782684"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588864","geom:area_square_m":2.73784519475315E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-95.725247,48.71234,-95.39698,48.999436","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-95.538296,"wof:geomhash":"4d0955b6f62651f41ff3be20e8ef2167","wof:parent_id":404512937,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Salol"}