28056 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":35.217234,"wof:name":"28056","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102087869,"locality_id":85981127,"postalcode_id":554711091,"region_id":85688773}],"mz:is_deprecated":0,"lbl:latitude":35.216936,"mz:postal_locality_alt":["Belmont","Lowell"],"geom:area":0.012276,"geom:longitude":-81.125194,"wof:id":554711091,"counts:concordances_total":1,"geom:type":"MultiPolygon","wof:lastmodified":1611185310,"wof:belongsto":[102191575,85633793,102087869,85981127,85688773],"wof:concordances":{"gp:id":"12769391"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"geom:area_square_m":1.24015753212012E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-81.209821,35.152217,-81.040474,35.333088","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-81.125003,"wof:geomhash":"fdb9e4a2691887d130eea39cd8ddbcc1","wof:parent_id":85981127,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Gastonia"}