17509 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":39.909668,"wof:name":"17509","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102081377,"localadmin_id":404483375,"postalcode_id":554705231,"region_id":85688481}],"mz:is_deprecated":0,"lbl:latitude":39.912055,"geom:area":0.007058,"geom:longitude":-76.030085,"wof:id":554705231,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611184120,"wof:belongsto":[102191575,85633793,102081377,404483375,85688481],"wof:concordances":{"gp:id":"12764790"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12589763","geom:area_square_m":6.6943737386822E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-76.083331,39.845393,-75.980963,39.966724","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-76.036499,"wof:geomhash":"1b6597eb4538cda43fa5f61c9484b852","wof:parent_id":404483375,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Christiana"}