71378 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":31.955431,"wof:name":"71378","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102086683,"postalcode_id":554741413,"region_id":85688735}],"mz:is_deprecated":0,"lbl:latitude":31.942365,"mz:postal_locality_alt":["Gilbert"],"geom:area":0.012876,"geom:longitude":-91.709365,"wof:id":554741413,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611184045,"wof:belongsto":[102191575,85633793,102086683,85688735],"wof:concordances":{"gp:id":"12788752"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588616","geom:area_square_m":1.35088311242011E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-91.785179,31.871896,-91.632776,32.041196","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-91.708659,"wof:geomhash":"628324a8d985f9bfdb37aa61b0445538","wof:parent_id":102086683,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Wisner"}