02176 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":42.455604,"wof:name":"02176","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102084643,"localadmin_id":404476405,"locality_id":85950345,"postalcode_id":554697413,"region_id":85688645}],"mz:is_deprecated":0,"lbl:latitude":42.455723,"mz:postal_locality_alt":["Boston"],"geom:area":0.00135,"geom:longitude":-71.059031,"wof:id":554697413,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611184640,"wof:belongsto":[102191575,85633793,102084643,404476405,85950345,85688645],"wof:concordances":{"gp:id":"12758757"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588708","geom:area_square_m":1.2318345666854E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-71.082919,42.43884,-71.025864,42.475895","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-71.059019,"wof:geomhash":"cffb0730584df64e94989c1e82eab346","wof:parent_id":85950345,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Melrose"}