28747 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":35.157162,"wof:name":"28747","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102087629,"postalcode_id":554711771,"region_id":85688773}],"mz:is_deprecated":0,"lbl:latitude":35.155183,"mz:postal_locality_alt":["Whittier"],"geom:area":0.013708,"geom:longitude":-82.923286,"wof:id":554711771,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611185319,"wof:belongsto":[102191575,85633793,102087629,85688773],"wof:concordances":{"gp:id":"12769895"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12589461","geom:area_square_m":1.38585493672311E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-83.023786,35.077281,-82.833881,35.214243","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-82.922658,"wof:geomhash":"0f57190408466daa0d5221e7ce8ec71c","wof:parent_id":102087629,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Lake Toxaway"}