15212 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":40.470779,"wof:name":"15212","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102080887,"localadmin_id":404482523,"locality_id":101718805,"postalcode_id":554703549,"region_id":85688481}],"mz:is_deprecated":0,"lbl:latitude":40.456946,"mz:postal_locality_alt":["Allegheny"],"geom:area":0.001808,"geom:longitude":-80.007526,"wof:id":554703549,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611184480,"wof:belongsto":[102191575,85633793,102080887,404482523,101718805,85688481],"wof:concordances":{"gp:id":"12763653"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"geom:area_square_m":1.7009441040543E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-80.053179,40.442975,-79.970767,40.497174","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-79.990054,"wof:geomhash":"6224bd6a8d603c242cfcdd49ff62a824","wof:parent_id":101718805,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Pittsburgh"}