06374 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":41.680399,"wof:name":"06374","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102085377,"localadmin_id":404495925,"locality_id":85931341,"postalcode_id":554699523,"region_id":85688629}],"mz:is_deprecated":0,"lbl:latitude":41.681913,"geom:area":0.007352,"geom:longitude":-71.914212,"wof:id":554699523,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611184634,"wof:belongsto":[102191575,85633793,102085377,404495925,85931341,85688629],"wof:concordances":{"gp:id":"12760360"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12587798","geom:area_square_m":6.7895506575251E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-71.966329,41.634328,-71.853826,41.74709","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-71.910936,"wof:geomhash":"8b137773bec8716145593711fc6b8aba","wof:parent_id":85931341,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Plainfield"}