6616 is a postalcode and its consensus geometry is derived from oa.
{"mz:is_ceased":0,"geom:latitude":51.833899,"wof:name":"6616","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":-1,"mz:is_approximate":1,"wof:hierarchy":[{"continent_id":102191581,"country_id":85633337,"localadmin_id":404473953,"locality_id":1158783755,"postalcode_id":538955949,"region_id":85687043}],"mz:is_deprecated":0,"geom:area":6.24E-4,"geom:longitude":5.680213,"wof:id":538955949,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1513368220,"clustr:alpha":1,"wof:belongsto":[85687043,102191581,404473953,85633337,1158783755],"mz:is_clustr":1,"wof:concordances":{"gp:id":"12852653"},"wof:repo":"whosonfirst-data-postalcode-nl","src:geom":"oa","wof:country":"NL","counts:names_preferred":0,"gp:parent_id":"12592485","geom:area_square_m":4768405.355134,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"NL","counts:names_languages":0,"geom:bbox":"5.65366983414,51.8262481689,5.7105755806,51.8414916992","wof:superseded_by":[],"wof:supersedes":[],"wof:geomhash":"4e7344b23bca380e9b3e5a233635bb6b","wof:parent_id":1158783755,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu"}