18634 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":41.189183,"wof:name":"18634","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102081351,"localadmin_id":404486977,"postalcode_id":554705943,"region_id":85688481}],"mz:is_deprecated":0,"lbl:latitude":41.185512,"mz:postal_locality_alt":["Wapwallopen","Harveys Lake"],"geom:area":0.004213,"geom:longitude":-76.021535,"wof:id":554705943,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611184130,"wof:belongsto":[102191575,85633793,102081351,404486977,85688481],"wof:concordances":{"gp:id":"12765268"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12589767","geom:area_square_m":3.9206438934945E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-76.065553,41.151707,-75.974893,41.228436","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-76.022619,"wof:geomhash":"dbfbb0f8e7f66d396af4ee4f726d76c3","wof:parent_id":404486977,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Nanticoke"}