02538 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":41.777041,"wof:name":"02538","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102084367,"localadmin_id":404476567,"postalcode_id":554778425,"region_id":85688645}],"mz:is_deprecated":0,"lbl:latitude":41.777476,"mz:postal_locality_alt":["Wareham"],"geom:area":0.001405,"geom:longitude":-70.649152,"wof:id":554778425,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611183428,"wof:belongsto":[102191575,85633793,102084367,404476567,85688645],"wof:concordances":{"gp:id":"12758876"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588711","geom:area_square_m":1.2956237632568E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-70.686661,41.743717,-70.616478,41.80633","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-70.642148,"wof:geomhash":"1a11e481ea376dce666057cde50997e1","wof:parent_id":404476567,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"East Wareham"}