4891 is a postalcode and its consensus geometry is derived from ausstat.
{"mz:is_ceased":0,"geom:latitude":-17.470454,"wof:name":"4891","counts:names_total":0,"wof:placetype":"postalcode","mz:is_approximate":1,"wof:hierarchy":[{"continent_id":102191583,"country_id":85632793,"county_id":102049459,"localadmin_id":404542743,"locality_id":101934635,"postalcode_id":504781379,"region_id":85681463}],"mz:is_deprecated":0,"ausstat:POA_CODE":"4891","geom:area":0.001358,"geom:longitude":140.845125,"wof:id":504781379,"ausstat:POA_NAME":"4891","counts:concordances_total":1,"geom:type":"MultiPolygon","wof:lastmodified":1480899423,"ausstat:SQKM":15.96811,"wof:belongsto":[85681463,102191583,404542743,85632793,101934635,102049459],"wof:concordances":{"gp:id":"12708491"},"wof:repo":"whosonfirst-data-postalcode-au","src:geom":"ausstat","wof:country":"AU","counts:names_preferred":0,"gp:parent_id":"55864340","geom:area_square_m":1.6021304298706E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"AU","counts:names_languages":0,"geom:bbox":"140.8204168,-17.5078466915,140.868994912,-17.437481997","wof:superseded_by":[],"wof:supersedes":[],"wof:geomhash":"8adecbf4adec23f2531bfabae445ac12","wof:parent_id":101934635,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu"}