56257 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":44.97107,"wof:name":"56257","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102087677,"localadmin_id":404514435,"postalcode_id":554730117,"region_id":85688727}],"mz:is_deprecated":0,"lbl:latitude":44.969257,"geom:area":0.025618,"geom:longitude":-96.398056,"wof:id":554730117,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611182741,"wof:belongsto":[102191575,85633793,102087677,404514435,85688727],"wof:concordances":{"gp:id":"12782360"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588833","geom:area_square_m":2.24103188787728E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-96.4524,44.848683,-96.30906,45.12444","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-96.402151,"wof:geomhash":"350e1dcc318e710678003c4728d05ce5","wof:parent_id":404514435,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Marietta"}