53225 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":43.114953,"wof:name":"53225","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102081837,"localadmin_id":404492091,"locality_id":101732987,"postalcode_id":554727701,"region_id":85688517}],"mz:is_deprecated":0,"lbl:latitude":43.115154,"mz:postal_locality_alt":["Wauwatosa"],"geom:area":0.00197,"geom:longitude":-88.041876,"wof:id":554727701,"counts:concordances_total":1,"geom:type":"MultiPolygon","wof:lastmodified":1611185493,"wof:belongsto":[102191575,85633793,102081837,404492091,101732987,85688517],"wof:concordances":{"gp:id":"12780923"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"geom:area_square_m":1.7780849468684E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-88.070876,43.088902,-88.012062,43.147701","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-88.042944,"wof:geomhash":"c4a5a4e4ca6e2e0fbf61afac4a87b82b","wof:parent_id":101732987,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Milwaukee"}