19390 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":39.832888,"wof:name":"19390","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102081275,"localadmin_id":404482927,"postalcode_id":554706433,"region_id":85688481}],"mz:is_deprecated":0,"lbl:latitude":39.836097,"mz:postal_locality_alt":["New London","Avondale"],"geom:area":0.007154,"geom:longitude":-75.840078,"wof:id":554706433,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611182712,"wof:belongsto":[102191575,85633793,102081275,404482927,85688481],"wof:concordances":{"gp:id":"12765614"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12589742","geom:area_square_m":6.7926252326486E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-75.91093,39.781957,-75.783679,39.896773","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-75.842359,"wof:geomhash":"8ddf5fa5e84fc63437b4a7b29a4cd557","wof:parent_id":404482927,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"West Grove"}