18357 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":41.227688,"wof:name":"18357","counts:names_total":0,"wof:placetype":"postalcode","wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102080945,"localadmin_id":404483767,"postalcode_id":554767707,"region_id":85688481}],"mz:is_deprecated":0,"lbl:latitude":41.231653,"geom:area":0.001154,"geom:longitude":-75.218456,"wof:id":554767707,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1480906473,"wof:belongsto":[85688481,102191575,404483767,85633793,102080945],"wof:concordances":{"gp:id":"12765162"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12589772","geom:area_square_m":1.0735133849393E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-75.248323,41.205595,-75.190004,41.248782","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-75.210713,"wof:geomhash":"fbcfcb02c51db700d87aacc7588a6622","wof:parent_id":404483767,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu"}