51529 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":41.860338,"wof:name":"51529","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102086597,"postalcode_id":554726645,"region_id":85688713}],"mz:is_deprecated":0,"lbl:latitude":41.860476,"geom:area":0.036211,"geom:longitude":-95.625732,"wof:id":554726645,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611184870,"wof:belongsto":[102191575,85633793,102086597,85688713],"wof:concordances":{"gp:id":"12780338"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588314","geom:area_square_m":3.33479104033005E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-95.789592,41.748839,-95.440528,41.979759","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-95.643463,"wof:geomhash":"588c96d1735e3a25a01016452dbbf7c4","wof:parent_id":102086597,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Dunlap"}