28658 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":35.635871,"wof:name":"28658","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102087683,"postalcode_id":554711631,"region_id":85688773}],"mz:is_deprecated":0,"lbl:latitude":35.637619,"mz:postal_locality_alt":["Maiden","Hickory"],"geom:area":0.019108,"geom:longitude":-81.240859,"wof:id":554711631,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611185341,"wof:belongsto":[102191575,85633793,102087683,85688773],"wof:concordances":{"gp:id":"12769813"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12589391","geom:area_square_m":1.92032760030961E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-81.38149,35.580504,-81.099976,35.707714","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-81.235843,"wof:geomhash":"2c590aa730b34f2573ccd44cb5f70e60","wof:parent_id":102087683,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Newton"}