48446 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":43.053528,"wof:name":"48446","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102083637,"localadmin_id":404508073,"locality_id":85951891,"postalcode_id":554724293,"region_id":85688599}],"mz:is_deprecated":0,"lbl:latitude":43.05374,"mz:postal_locality_alt":["Davison"],"geom:area":0.035955,"geom:longitude":-83.337627,"wof:id":554724293,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611183751,"wof:belongsto":[102191575,85633793,102083637,404508073,85951891,85688599],"wof:concordances":{"gp:id":"12778838"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588757","geom:area_square_m":3.24867189454169E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-83.459134,42.945857,-83.204158,43.158051","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-83.338703,"wof:geomhash":"ce31a331d7714940d62c5fb22d080871","wof:parent_id":85951891,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Lapeer"}