55321 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":45.084079,"wof:name":"55321","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102087815,"localadmin_id":404515195,"postalcode_id":554729155,"region_id":85688727}],"mz:is_deprecated":0,"lbl:latitude":45.087589,"geom:area":0.024714,"geom:longitude":-94.192731,"wof:id":554729155,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611185428,"wof:belongsto":[102191575,85633793,102087815,404515195,85688727],"wof:concordances":{"gp:id":"12781805"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588882","geom:area_square_m":2.15770272577304E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-94.256128,44.978746,-94.104213,45.197448","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-94.193155,"wof:geomhash":"15449570d4b47a44fc875bacfa71735c","wof:parent_id":404515195,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Cokato"}