55748 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":47.008043,"wof:name":"55748","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102087811,"localadmin_id":404511215,"postalcode_id":554729497,"region_id":85688727}],"mz:is_deprecated":0,"lbl:latitude":47.014462,"geom:area":0.0377,"geom:longitude":-93.623913,"wof:id":554729497,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611185416,"wof:belongsto":[102191575,85633793,102087811,404511215,85688727],"wof:concordances":{"gp:id":"12782049"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588797","geom:area_square_m":3.17876342908059E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-93.775257,46.856071,-93.473711,47.109629","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-93.621281,"wof:geomhash":"d11de31f334a69ad35b7ebd63d9cc355","wof:parent_id":404511215,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Hill City"}