35660 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":34.755949,"wof:name":"35660","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102085625,"locality_id":85897473,"postalcode_id":554715573,"region_id":85688675}],"mz:is_deprecated":0,"lbl:latitude":34.755494,"geom:area":0.001703,"geom:longitude":-87.700898,"wof:id":554715573,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611183663,"wof:belongsto":[102191575,85633793,102085625,85897473,85688675],"wof:concordances":{"gp:id":"12773210"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12587503","geom:area_square_m":1.729862058127E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-87.741104,34.731435,-87.666672,34.780665","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-87.701265,"wof:geomhash":"3d1b1f74b4f147e36407b8af19fafe12","wof:parent_id":85897473,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Sheffield"}