23415 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":37.968993,"wof:name":"23415","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102081415,"postalcode_id":554780831,"region_id":85688747}],"mz:is_deprecated":0,"lbl:latitude":37.969553,"mz:postal_locality_alt":["Oak Hall"],"geom:area":0.008039,"geom:longitude":-75.536044,"wof:id":554780831,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611185187,"wof:belongsto":[102191575,85633793,102081415,85688747],"wof:concordances":{"gp:id":"12767361"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12590304","geom:area_square_m":7.8369084051907E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-75.648228,37.914775,-75.428885,38.010889","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-75.534703,"wof:geomhash":"ccc794d9b00ceb297593e8ffd3d29771","wof:parent_id":102081415,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"New Church"}