02118 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":42.338143,"wof:name":"02118","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102084423,"localadmin_id":404476573,"locality_id":85950361,"postalcode_id":554778323,"region_id":85688645}],"mz:is_deprecated":0,"lbl:latitude":42.337582,"mz:postal_locality_alt":["Roxbury","Dorchester"],"geom:area":3.11E-4,"geom:longitude":-71.070752,"wof:id":554778323,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611183433,"wof:belongsto":[102191575,85633793,102084423,404476573,85950361,85688645],"wof:concordances":{"gp:id":"12758717"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"geom:area_square_m":2838782.978138,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-71.088245,42.326256,-71.059487,42.347513","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-71.070482,"wof:geomhash":"386d49e8552e6e934f540a866ee24d86","wof:parent_id":85950361,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Boston"}